Page semi-protected

iOS

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
This article is about Apple's mobile operating system. For other uses, see IOS (disambiguation).

iOS
IOS wordmark (2017).svg
214px×463px
iOS 12 running on an iPhone X
DeveloperApple Inc.
Written inC, C++, Objective-C, Swift
OS familyUnix-like, based on Darwin (BSD), macOS
Working stateCurrent
Source modelClosed source
Initial releaseJune 29, 2007; 11 years ago (2007-06-29)
Latest release12.1.4[1] (16D57)[2] (February 7, 2019; 3 days ago (2019-02-07)) [±]
Latest preview12.2 Beta 2[3] (16E5191d)[4] (February 4, 2019; 6 days ago (2019-02-04)) [±]
Marketing targetSmartphones, tablet computers, portable media players
Available in40 languages[5][6][7][8]
Update methodiTunes or OTA (iOS 5 or later)
Platforms
Kernel typeHybrid (XNU)
Default user interfaceCocoa Touch (multi-touch, GUI)
LicenseProprietary software except for open-source components
Official websitewww.apple.com/ios/
Support status
Supported

iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently powers many of the company's mobile devices, including the iPhone, iPad, and iPod Touch. It is the second most popular mobile operating system globally after Android.

Originally unveiled in 2007 for the iPhone, iOS has been extended to support other Apple devices such as the iPod Touch (September 2007) and the iPad (January 2010). As of March 2018, Apple's App Store contains more than 2.1 million iOS applications, 1 million of which are native for iPads.[9] These mobile apps have collectively been downloaded more than 130 billion times.

The iOS user interface is based upon direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons. Interaction with the OS includes gestures such as swipe, tap, pinch, and reverse pinch, all of which have specific definitions within the context of the iOS operating system and its multi-touch interface. Internal accelerometers are used by some applications to respond to shaking the device (one common result is the undo command) or rotating it in three dimensions (one common result is switching between portrait and landscape mode). Apple has been significantly praised for incorporating thorough accessibility functions into iOS, enabling users with vision and hearing disabilities to properly use its products.

Major versions of iOS are released annually. The current version, iOS 12, was released on September 17, 2018. It is available for all iOS devices with 64-bit processors; the iPhone 5S and later iPhone models, the iPad (2017), the iPad Air and later iPad Air models, all iPad Pro models, the iPad Mini 2 and later iPad Mini models, and the sixth-generation iPod Touch. On all recent iOS devices, iOS regularly checks on the availability of an update, and if one is available, will prompt the user to permit its automatic installation.

History

Original iOS logo, used until 2013 (left) and logo used 2013–17 (right)

In 2005, when Steve Jobs began planning the iPhone, he had a choice to either "shrink the Mac, which would be an epic feat of engineering, or enlarge the iPod". Jobs favored the former approach but pitted the Macintosh and iPod teams, led by Scott Forstall and Tony Fadell, respectively, against each other in an internal competition, with Forstall winning by creating the iPhone OS. The decision enabled the success of the iPhone as a platform for third-party developers: using a well-known desktop operating system as its basis allowed the many third-party Mac developers to write software for the iPhone with minimal retraining. Forstall was also responsible for creating a software development kit for programmers to build iPhone apps, as well as an App Store within iTunes.[10][11]

The operating system was unveiled with the iPhone at the Macworld Conference & Expo on January 9, 2007, and released in June of that year.[12][13][14] At the time of its unveiling in January, Steve Jobs claimed: "iPhone runs OS X" and runs "desktop applications",[15][16] but at the time of the iPhone's release, the operating system was renamed "iPhone OS".[17] Initially, third-party native applications were not supported. Jobs' reasoning was that developers could build web applications through the Safari web browser that "would behave like native apps on the iPhone".[18][19] In October 2007, Apple announced that a native Software Development Kit (SDK) was under development and that they planned to put it "in developers' hands in February".[20][21][22] On March 6, 2008, Apple held a press event, announcing the iPhone SDK.[23][24]

The iOS App Store was opened on July 10, 2008 with an initial 500 applications available.[25] This quickly grew to 3,000 in September 2008,[26] 15,000 in January 2009,[27] 50,000 in June 2009,[28] 100,000 in November 2009,[29][30] 250,000 in August 2010,[31][32] 650,000 in July 2012,[33] 1 million in October 2013,[34][35] 2 million in June 2016,[36][37][38] and 2.2 million in January 2017.[39][40] As of March 2016, 1 million apps are natively compatible with the iPad tablet computer.[41] These apps have collectively been downloaded more than 130 billion times.[36] App intelligence firm Sensor Tower has estimated that the App Store will reach 5 million apps by the year 2020.[42]

In September 2007, Apple announced the iPod Touch, a redesigned iPod based on the iPhone form factor.[43] In January 2010, Apple announced the iPad, featuring a larger screen than the iPhone and iPod Touch, and designed for web browsing, media consumption, and reading.[44]

In June 2010, Apple rebranded iPhone OS as "iOS". The trademark "IOS" had been used by Cisco for over a decade for its operating system, IOS, used on its routers. To avoid any potential lawsuit, Apple licensed the "IOS" trademark from Cisco.[45]

In October 2016, Apple opened its first iOS Developer Academy in Naples inside University of Naples Federico II's new campus.[46][47]

Software updates

Main article: iOS version history
See also: iPhone OS 1, iPhone OS 2, iPhone OS 3, iOS 4, iOS 5, iOS 6, iOS 7, iOS 8, iOS 9, iOS 10, iOS 11, and iOS 12

Platform usage as measured by the App Store on January 1, 2019.[48]

  iOS 12 (75%)
  iOS 11 (17%)
  iOS 10 and earlier (8%)

Apple provides major updates to the iOS operating system annually via iTunes and also, for iOS 5 and later, over-the-air.[49] The latest version is iOS 12, released on September 17, 2018.[50] It is available for iPhone 5S and later, iPad Air and later, iPad Pro, iPad Mini 2 and later, and sixth-generation iPod Touch.[51]

Originally, iPod Touch users had to pay for system software updates. This was due to accounting rules making the device not a "subscription device" like iPhone or Apple TV, and significant enhancements to the device required payments.[52][53] The requirement to pay to upgrade caused iPod Touch owners to stay away from updates.[54] However, in September 2009, a change in accounting rules won tentative approval, significantly affecting both Apple's earnings and stock price, and allowing iPod Touch updates to be delivered for free.[55][56]

Features

Home screen

Main article: SpringBoard
iOS 12 running on an iPhone X

The home screen, rendered by SpringBoard, displays application icons and a dock at the bottom where users can pin their most frequently used apps. The home screen appears whenever the user unlocks the device or presses the physical "Home" button whilst in another app.[57] Before iOS 4 on the iPhone 3GS (or later), the screen's background could be customized only through jailbreaking, but can now be changed out-of-the-box. The screen has a status bar across the top to display data, such as time, battery level, and signal strength. The rest of the screen is devoted to the current application. When a passcode is set and a user switches on the device, the passcode must be entered at the Lock Screen before access to the Home screen is granted.[58]

In iPhone OS 3, Spotlight was introduced, allowing users to search media, apps, emails, contacts, messages, reminders, calendar events, and similar content. In iOS 7 and later, Spotlight is accessed by pulling down anywhere on the home screen (except for the top and bottom edges that open Notification Center and Control Center).[59][60] In iOS 9, there are two ways to access Spotlight. As with iOS 7 and 8, pulling down on any homescreen will show Spotlight. However, it can also be accessed as it was in iOS 3 – 6. This gives a Spotlight endowed with Siri suggestions, which include app suggestions, contact suggestions and news.[61] In iOS 10, Spotlight is at the top of the now-dedicated "Today" panel.[62]

Since iOS 3.2, users are able to set a background image for the Home screen. This feature is only available on third-generation devices—iPhone 3GS, third-generation iPod touch (iOS 4.0 or newer), all iPad models (since iOS 3.2)—or newer.

Researchers found that users organize icons on their homescreens based on usage-frequency and relatedness of the applications, as well as for reasons of usability and aesthetics.[63]

System font

iOS originally used Helvetica as the system font. Apple switched to Helvetica Neue exclusively for the iPhone 4 and its Retina Display, and retained Helvetica as the system font for older iPhone devices on iOS 4.[64] With iOS 7, Apple announced that they would change the system font to Helvetica Neue Light, a decision that sparked criticism for inappropriate usage of a light, thin typeface for low-resolution mobile screens. Apple eventually chose Helvetica Neue instead.[65][66] The release of iOS 7 also introduced the ability to scale text or apply other forms of text accessibility changes through Settings.[67][68] With iOS 9, Apple changed the font to San Francisco, an Apple-designed font aimed at maximum legibility and font consistency across its product lineup.[69][70]

Folders

iOS 4 introduced folders, which can be created by dragging an application on top of another, and from then on, more items can be added to the folder using the same procedure. A title for the folder is automatically selected by the category of applications inside, but the name can also be edited by the user.[71] When apps inside folders receive notification badges, the individual numbers of notifications are added up and the total number is displayed as a notification badge on the folder itself.[71] Originally, folders on an iPhone could include up to 12 apps, while folders on iPad could include 20.[72] With increasing display sizes on newer iPhone hardware, iOS 7 updated the folders with pages similar to the home screen layout, allowing for a significant expansion of folder functionality. Each page of a folder can contain up to nine apps, and there can be 15 pages in total, allowing for a total of 135 apps in a single folder.[73] In iOS 9, Apple updated folder sizes for iPad hardware, allowing for 16 apps per page, still at 15 pages maximum, increasing the total to 240 apps.[74]

Notification Center

Main article: Notification Center

Before iOS 5, notifications were delivered in a modal window and couldn't be viewed after being dismissed. In iOS 5, Apple introduced Notification Center, which allows users to view a history of notifications. The user can tap a notification to open its corresponding app, or clear it.[75] Notifications are now delivered in banners that appear briefly at the top of the screen. If a user taps a received notification, the application that sent the notification will be opened. Users can also choose to view notifications in modal alert windows by adjusting the application's notification settings. Introduced with iOS 8, widgets are now accessible through the Notification Center, defined by 3rd parties.

When an app sends a notification while closed, a red badge appears on its icon. This badge tells the user, at a glance, how many notifications that app has sent. Opening the app clears the badge.

Accessibility

iOS offers various accessibility features to help users with vision and hearing disabilities. One major feature, VoiceOver, provides a voice reading information on the screen, including contextual buttons, icons, links and other user interface elements, and allows the user to navigate the operating system through gestures. Any apps with default controls and developed with a UIKit framework gets VoiceOver functionality built in.[76] One example includes holding up the iPhone to take a photo, with VoiceOver describing the photo scenery.[77] As part of a "Made for iPhone" program, introduced with the release of iOS 7 in 2013, Apple has developed technology to use Bluetooth and a special technology protocol to let compatible third-party equipment connect with iPhones and iPads for streaming audio directly to a user's ears. Additional customization available for Made for iPhone products include battery tracking and adjustable sound settings for different environments.[78][79] Apple made further efforts for accessibility for the release of iOS 10 in 2016, adding a new pronunciation editor to VoiceOver, adding a Magnifier setting to enlarge objects through the device's camera, software TTY support for deaf people to make phone calls from the iPhone, and giving tutorials and guidelines for third-party developers to incorporate proper accessibility functions into their apps.[80]

In 2012, Liat Kornowski from The Atlantic wrote that "the iPhone has turned out to be one of the most revolutionary developments since the invention of Braille",[81] and in 2016, Steven Aquino of TechCrunch described Apple as "leading the way in assistive technology", with Sarah Herrlinger, Senior Manager for Global Accessibility Policy and Initiatives at Apple, stating that "We see accessibility as a basic human right. Building into the core of our products supports a vision of an inclusive world where opportunity and access to information are barrier-free, empowering individuals with disabilities to achieve their goals".[82]

Multitasking

Multitasking for iOS was first released in June 2010 along with the release of iOS 4.[83][84] Only certain devices—iPhone 4, iPhone 3GS, and iPod Touch 3rd generation—were able to multitask.[85] The iPad did not get multitasking until iOS 4.2.1 in November.[86] Currently, multitasking is supported on iPhone 3GS+, iPod Touch 3rd generation+, and all iPad models.[87]

Implementation of multitasking in iOS has been criticized for its approach, which limits the work that applications in the background can perform to a limited function set and requires application developers to add explicit support for it.[85][88]

Before iOS 4, multitasking was limited to a selection of the applications Apple included on the device. Users could, however "jailbreak" their device in order to unofficially multitask.[89] Starting with iOS 4, on third-generation and newer iOS devices, multitasking is supported through seven background APIs:[90]

  1. Background audio – application continues to run in the background as long as it is playing audio or video content[91]
  2. Voice over IP – application is suspended when a phone call is not in progress[91]
  3. Background location – application is notified of location changes[91]
  4. Push notifications
  5. Local notifications – application schedules local notifications to be delivered at a predetermined time[91]
  6. Task completion – application asks the system for extra time to complete a given task[91]
  7. Fast app switching – application does not execute any code and may be removed from memory at any time[91]

In iOS 5, three new background APIs were introduced:

  1. Newsstand – application can download content in the background to be ready for the user[91]
  2. External Accessory – application communicates with an external accessory and shares data at regular intervals[91]
  3. Bluetooth Accessory – application communicates with a bluetooth accessory and shares data at regular intervals[91]

In iOS 7, Apple introduced a new multitasking feature, providing all apps with the ability to perform background updates. This feature prefers to update the user's most frequently used apps and prefers to use WiFi networks over a cellular network, without markedly reducing the device's battery life.

Switching applications

In iOS 4.0 to iOS 6.x, double-clicking the home button activates the application switcher. A scrollable dock-like interface appears from the bottom, moving the contents of the screen up. Choosing an icon switches to an application. To the far left are icons which function as music controls, a rotation lock, and on iOS 4.2 and above, a volume controller.

With the introduction of iOS 7, double clicking the home button also activates the application switcher. However, unlike previous versions it displays screenshots of open applications on top of the icon and horizontal scrolling allows for browsing through previous apps, and it is possible to close applications by dragging them up, similar to how WebOS handled multiple cards.[92]

With the introduction of iOS 9, the application switcher received a significant visual change; whilst still retaining the card metaphor introduced in iOS 7, the application icon is smaller, and appears above the screenshot (which is now larger, due to the removal of "Recent and Favorite Contacts"), and each application "card" overlaps the other, forming a rolodex effect as the user scrolls. Now, instead of the home screen appearing at the leftmost of the application switcher, it appears rightmost.[93] In iOS 11, the application switcher receives a major redesign. In the iPad, the Control Center and app switcher are combined. The app switcher in the iPad can also be accessed by swiping up from the bottom. In the iPhone, the app switcher cannot be accessed if there are no apps in the RAM.

Ending tasks

In iOS 4.0 to iOS 6.x, briefly holding the icons in the application switcher makes them "jiggle" (similarly to the homescreen) and allows the user to force quit the applications by tapping the red minus circle that appears at the corner of the app's icon.[94] Clearing applications from multitasking stayed the same from iOS 4.0 through 6.1.6, the last version of iOS 6.

As of iOS 7, the process has become faster and easier. In iOS 7, instead of holding the icons to close them, they are closed by simply swiping them upwards off the screen. Up to three apps can be cleared at a time compared to one in versions up to iOS 6.1.6.[95]

Task completion

Task completion allows apps to continue a certain task after the app has been suspended.[96][97] As of iOS 4.0, apps can request up to ten minutes to complete a task in the background.[98] This doesn't extend to background up- and downloads though (e.g. if you start a download in one application, it won't finish if you switch away from the application).

Siri

Main article: Siri

Siri (/ˈsɪəri/) is an intelligent personal assistant integrated into iOS. The assistant uses voice queries and a natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of Internet services. The software adapts to users' individual language usages, searches, and preferences, with continuing use. Returned results are individualized.

Originally released as an app for iOS in February 2010,[99] it was acquired by Apple two months later,[100][101][102] and then integrated into iPhone 4S at its release in October 2011.[103][104] At that time, the separate app was also removed from the iOS App Store.[105]

Siri supports a wide range of user commands, including performing phone actions, checking basic information, scheduling events and reminders, handling device settings, searching the Internet, navigating areas, finding information on entertainment, and is able to engage with iOS-integrated apps.[106] With the release of iOS 10 in 2016, Apple opened up limited third-party access to Siri, including third-party messaging apps, as well as payments, ride-sharing, and Internet calling apps.[107][108] With the release of iOS 11, Apple updated Siri's voices for more clear, human voices, it now supports follow-up questions and language translation, and additional third-party actions.[109][110]

Game Center

Main article: Game Center

Game Center is an online multiplayer "social gaming network"[111] released by Apple.[112] It allows users to "invite friends to play a game, start a multiplayer game through matchmaking, track their achievements, and compare their high scores on a leaderboard." iOS 5 and above adds support for profile photos.[111]

Game Center was announced during an iOS 4 preview event hosted by Apple on April 8, 2010. A preview was released to registered Apple developers in August.[111] It was released on September 8, 2010 with iOS 4.1 on iPhone 4, iPhone 3GS, and iPod Touch 2nd generation through 4th generation.[113] Game Center made its public debut on the iPad with iOS 4.2.1.[114] There is no support for the iPhone 3G, original iPhone and the first-generation iPod Touch (the latter two devices did not have Game Center because they did not get iOS 4).[115] However, Game Center is unofficially available on the iPhone 3G via a hack.[116]

Hardware

The main hardware platform for iOS is the ARM architecture. iOS releases before iOS 7 can only be run on iOS devices with 32-bit ARM processors (ARMv6 and ARMv7-A architectures). In 2013, iOS 7 was released with full 64-bit support (which includes native 64-bit kernel, libraries, drivers as well as all built-in applications),[117] after Apple announced that they were switching to 64-bit ARMv8-A processors with the introduction of the Apple A7 chip.[118] 64-bit support was also enforced for all apps in the App Store; All new apps submitted to the App Store with a deadline of February 2015, and all app updates submitted to the App Store with a deadline of June 1, 2015.[119] iOS 11 drops support for all iOS devices with 32-bit ARM processors as well as 32-bit applications,[120][121] making iOS 64-bit only.[122]

Development

Main article: iOS SDK

The iOS SDK (Software Development Kit) allows for the development of mobile apps on iOS.

While originally developing iPhone prior to its unveiling in 2007, Apple's then-CEO Steve Jobs did not intend to let third-party developers build native apps for iOS, instead directing them to make web applications for the Safari web browser.[123] However, backlash from developers prompted the company to reconsider,[123] with Jobs announcing in October 2007 that Apple would have a software development kit available for developers by February 2008.[124][125] The SDK was released on March 6, 2008.[126][127]

The SDK is a free download for users of Mac personal computers.[128] It is not available for Microsoft Windows PCs.[128] The SDK contains sets giving developers access to various functions and services of iOS devices, such as hardware and software attributes.[129] It also contains an iPhone simulator to mimic the look and feel of the device on the computer while developing.[129] New versions of the SDK accompany new versions of iOS.[130][131] In order to test applications, get technical support, and distribute apps through App Store, developers are required to subscribe to the Apple Developer Program.[128]

Combined with Xcode, the iOS SDK helps developers write iOS apps using officially supported programming languages, including Swift and Objective-C.[132] Other companies have also created tools that allow for the development of native iOS apps using their respective programming languages.[133][134]

Market share

Main article: Usage share of operating systems

iOS is the second most popular mobile operating system in the world, after Android. Sales of iPads in recent years are also behind Android, while, by web use (a proxy for all use), iPads (using iOS) are still most popular.[135]

By the middle of 2012, there were 410 million devices activated.[136] At WWDC 2014, Tim Cook said 800 million devices had been sold by June 2014.[137]

During Apple's quarterly earnings call in January 2015, the company announced that they had sold over one billion iOS devices since 2007.[138][139]

By late 2011, iOS accounted for 60% of the market share for smartphones and tablets.[140] By the end of 2014, iOS accounted for 14.8% of the smartphone market[141] and 27.6% of the tablet and two-in-one market.[142] In February 2015, StatCounter reported iOS was used on 23.18% of smartphones and 66.25% of tablets worldwide, measured by internet usage instead of sales.[143]

In the third quarter of 2015, research from Strategy Analytics showed that iOS adoption of the worldwide smartphone market was at a record-low 12.1%, attributed to lackluster performance in China and Africa. Android accounted for 87.5% of the market, with Windows Phone and BlackBerry accounting for the rest.[144][145]

Jailbreaking

Main article: iOS jailbreaking

Since its initial release, iOS has been subject to a variety of different hacks centered around adding functionality not allowed by Apple.[146] Prior to the 2008 debut of Apple's native iOS App Store, the primary motive for jailbreaking was to bypass Apple's purchase mechanism for installing the App Store's native applications.[147] Apple claimed that it will not release iOS software updates designed specifically to break these tools (other than applications that perform SIM unlocking); however, with each subsequent iOS update, previously un-patched jailbreak exploits are usually patched.[148]

Since the arrival of Apple's native iOS App Store, and—along with it—third-party applications, the general motives for jailbreaking have changed.[149] People jailbreak for many different reasons, including gaining filesystem access, installing custom device themes, and modifying SpringBoard. An additional motivation is that it may enable the installation of pirated apps. On some devices, jailbreaking also makes it possible to install alternative operating systems, such as Android and the Linux kernel. Primarily, users jailbreak their devices because of the limitations of iOS. Depending on the method used, the effects of jailbreaking may be permanent or temporary.[150]

In 2010, the Electronic Frontier Foundation (EFF) successfully convinced the U.S. Copyright Office to allow an exemption to the general prohibition on circumvention of copyright protection systems under the Digital Millennium Copyright Act (DMCA). The exemption allows jailbreaking of iPhones for the sole purpose of allowing legally obtained applications to be added to the iPhone.[151] The exemption does not affect the contractual relations between Apple and an iPhone owner, for example, jailbreaking voiding the iPhone warranty; however, it is solely based on Apple's discretion on whether they will fix jailbroken devices in the event that they need to be repaired. At the same time, the Copyright Office exempted unlocking an iPhone from DMCA's anticircumvention prohibitions.[152] Unlocking an iPhone allows the iPhone to be used with any wireless carrier using the same GSM or CDMA technology for which the particular phone model was designed to operate.[153]

Unlocking

Main article: SIM lock

Initially most wireless carriers in the US did not allow iPhone owners to unlock it for use with other carriers. However AT&T allowed iPhone owners who have satisfied contract requirements to unlock their iPhone.[154] Instructions to unlock the device are available from Apple,[155] but it is ultimately the sole discretion of the carrier to authorize the device to be unlocked.[156] This allows the use of a carrier-sourced iPhone on other networks. Modern versions of iOS and the iPhone fully support LTE across multiple carriers despite where the phone was originally purchased from.[157] There are programs to remove SIM lock restrictions, but are not supported by Apple and most often not a permanent unlock – a soft-unlock.[158]

Digital rights management

The closed and proprietary nature of iOS has garnered criticism, particularly by digital rights advocates such as the Electronic Frontier Foundation, computer engineer and activist Brewster Kahle, Internet-law specialist Jonathan Zittrain, and the Free Software Foundation who protested the iPad's introductory event and have targeted the iPad with their "Defective by Design" campaign.[159][160][161][162] Competitor Microsoft, via a PR spokesman, criticized Apple's control over its platform.[163]

At issue are restrictions imposed by the design of iOS, namely digital rights management (DRM) intended to lock purchased media to Apple's platform, the development model (requiring a yearly subscription to distribute apps developed for the iOS), the centralized approval process for apps, as well as Apple's general control and lockdown of the platform itself. Particularly at issue is the ability for Apple to remotely disable or delete apps at will.

Some in the tech community have expressed concern that the locked-down iOS represents a growing trend in Apple's approach to computing, particularly Apple's shift away from machines that hobbyists can "tinker with" and note the potential for such restrictions to stifle software innovation.[164][165] Former Facebook developer Joe Hewitt protested against Apple's control over its hardware as a "horrible precedent" but praised iOS's sandboxing of apps.[166]

Kernel

The iOS kernel is the XNU kernel of Darwin. The original iPhone OS (1.0) up to iPhone OS 3.1.3 used Darwin 9.0.0d1. iOS 4 was based on Darwin 10. iOS 5 was based on Darwin 11. iOS 6 was based on Darwin 13. iOS 7 and iOS 8 are based on Darwin 14. iOS 9 is based on Darwin 15. iOS 10 is based on Darwin 16. iOS 11 is based on Darwin 17. iOS 12 is based on Darwin 18.[167]

Security

iOS utilizes many security features in both hardware and software. Below are summaries of the most prominent features.

Secure Boot

Before fully booting into iOS, there is low-level code that runs from the Boot ROM. Its task is to verify that the Low-Level Bootloader is signed by the Apple Root CA public key before running it. This process is to ensure that no malicious or otherwise unauthorized software can be run on an iOS device. After the Low-Level Bootloader finishes its tasks, it runs the higher level bootloader, known as iBoot. If all goes well, iBoot will then proceed to load the iOS kernel as well as the rest of the operating system.[168]

Secure Enclave

The Secure Enclave is a coprocessor found in iOS devices that contain Touch ID or Face ID. It has its own secure boot process to ensure that it is completely secure. A hardware random number generator is also included as a part of this coprocessor. Each device's Secure Enclave has a unique ID that is given to it when it is made and cannot be changed. This identifier is used to create a temporary key that encrypts the memory in this portion of the system. The Secure Enclave also contains an anti-replay counter to prevent brute force attacks.[168]

Passcode

iOS devices can have a passcode that is used to unlock the device, make changes to system settings, and encrypt the device's contents. Until recently, these were typically four numerical digits long. However, since unlocking the devices with a fingerprint by using Touch ID has become more widespread, six-digit passcodes are now the default on iOS with the option to switch back to four or use an alphanumeric passcode.[168]

Touch ID

Main article: Touch ID

Touch ID is a fingerprint scanner that is embedded in the home button and can be used to unlock the device, make purchases, and log into applications among other functions. When used, Touch ID only temporarily stores the fingerprint data in encrypted memory in the Secure Enclave, as described above. There is no way for the device's main processor or any other part of the system to access the raw fingerprint data that is obtained from the Touch ID sensor.[168]

Address Space Layout Randomization

Main article: Address Space Layout Randomization

Address Space Layout Randomization (ASLR) is a low-level technique of preventing memory corruption attacks such as buffer overflows. It involves placing data in randomly selected locations in memory in order to make it harder to predict ways to corrupt the system and create exploits. ASLR makes app bugs more likely to crash the app than to silently overwrite memory, regardless of whether the behavior is accidental or malicious.[169]

Non-Executable Memory

iOS utilizes the ARM architecture's Execute Never (XN) feature. This allows some portions of the memory to be marked as non-executable, working alongside ASLR to prevent buffer overflow attacks including return-to-libc attacks.[168]

Encryption

As mentioned above, one use of encryption in iOS is in the memory of the Secure Enclave. When a passcode is utilized on an iOS device, the contents of the device are encrypted. This is done by using a hardware AES 256 implementation that is very efficient because it is placed directly between the flash storage and RAM.[168]

iOS, in combination with its specific hardware, uses crypto-shredding when erasing all content and settings by obliterating all the keys in 'effaceable storage'. This renderes all user data on the device cryptographically inaccessible.[170]

Keychain

The iOS keychain is a database of login information that can be shared across apps written by the same person or organization.[168] This service is often used for storing passwords for web applications.[171]

App Security

Third-party applications such as those distributed through the App Store must be code signed with an Apple-issued certificate. This continues the chain of trust all the way from the Secure Boot process as mentioned above to the actions of the applications installed on the device by users. Applications are also sandboxed, meaning that they can only modify the data within their individual home directory unless explicitly given permission to do otherwise. For example, they cannot access data that is owned by other user-installed applications on the device. There is a very extensive set of privacy controls contained within iOS with options to control apps' ability to access a wide variety of permissions such as the camera, contacts, background app refresh, cellular data, and access to other data and services. Most of the code in iOS, including third-party applications, run as the "mobile" user which does not have root privileges. This ensures that system files and other iOS system resources remain hidden and inaccessible to user-installed applications.[168]

Network Security

iOS supports TLS with both low- and high-level APIs for developers. By default, the App Transport Security framework requires that servers use at least TLS 1.2. However, developers are free to override this framework and utilize their own methods of communicating over networks. When Wi-Fi is enabled, iOS uses a randomized MAC address so that devices cannot be tracked by anyone sniffing wireless traffic.[168]

Two-Factor Authentication

Main article: Multi-factor authentication

Two-factor authentication is an option in iOS to ensure that even if an unauthorized person knows an Apple ID and password combination, they cannot gain access to the account. It works by requiring not only the Apple ID and password, but also a verification code that is sent to a device that is already known to be trusted.[168] If an unauthorized user attempts to sign in using another user's Apple ID, the owner of the Apple ID receives a notification that allows them to deny access to the unrecognized device.[172]

Devices

Main article: List of iOS devices
Apple Watch Series 3Apple Watch Series 3Apple Watch Series 3Apple Watch Series 3Apple Watch Series 2Apple Watch Series 2Apple Watch Series 2Apple Watch Series 2Apple WatchApple WatchApple WatchApple WatchApple TVApple TVApple TVApple TVApple TViPad Mini 4iPad Mini 3iPad Mini 2iPad Mini (1st generation)iPad ProiPad ProiPad ProiPad ProiPad Air 2iPad AiriPad (4th generation)iPad (3rd generation)iPad (2nd generation)iPad (1st generation)iPod Touch (6th generation)iPod Touch (5th generation)iPod Touch (5th generation)iPod Touch#ModelsiPod Touch#ModelsiPod Touch#ModelsiPod Touch#ModelsiPod Touch#ModelsiPhone XiPhone 8iPhone 8iPhone 7iPhone 7iPhone 7iPhone 7iPhone 7iPhone 7iPhone SEiPhone 6SiPhone 6SiPhone 6 PlusiPhone 6iPhone 5SiPhone 5CiPhone 5iPhone 4SiPhone 4iPhone 3GSiPhone 3GSiPhone 3GiPhone 3GiPhone (1st generation)
Sources: Apple Newsroom Archive,[173] Mactracker Apple Inc. model database[174]

See also

References

  1. ^ Juli Clover (February 7, 2019). "iOS 12.1.4 Now Available With Group FaceTime Bug Fix". MacRumors. Retrieved February 7, 2019.
  2. ^ "iOS 12.1.4 (16D57) - Releases - Apple Developer". Apple Developer. Apple Inc. February 7, 2019. Retrieved February 7, 2019.
  3. ^ Juli Clover (February 4, 2019). "Apple Releases Second Developer Beta of iOS 12.2". MacRumors. Retrieved February 4, 2019.
  4. ^ "iOS 12.2 beta 2 (16E5191d) - Releases - Apple Developer". Apple Developer. February 4, 2019. Retrieved February 4, 2019.
  5. ^ "Apple – iPad Pro – Specs". Apple. Archived from the original on January 4, 2019. Retrieved January 4, 2019.
  6. ^ "Apple – iPad mini 4 – Specs". Apple. Archived from the original on October 24, 2015. Retrieved October 24, 2015.
  7. ^ "Apple – iPad Air 2 – Technical Specifications". Apple. Archived from the original on October 26, 2015. Retrieved October 24, 2015.
  8. ^ "Apple – iPhone XS – Technical Specifications". Apple. Archived from the original on January 4, 2019. Retrieved January 4, 2019.
  9. ^ "Charting The Explosive Growth of the App Store". Lifewire. Retrieved 2018-10-15.
  10. ^ Satariano, Adam; Burrows, Peter; Stone, Brad (October 14, 2011). "Scott Forstall, the Sorcerer's Apprentice at Apple". Bloomberg Businessweek. Bloomberg L.P. Archived from the original on April 7, 2017. Retrieved April 1, 2017.
  11. ^ Kim, Arnold (October 12, 2011). "Scott Forstall's Personality, Origins of iOS, and Lost iPhone 4 Prototype". MacRumors. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  12. ^ Thomas, Owen (January 9, 2007). "Apple: Hello, iPhone". CNN Money. CNN. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  13. ^ Eadicicco, Lisa (January 9, 2017). "Watch Steve Jobs Unveil the First iPhone 10 Years Ago Today". Time. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  14. ^ Honan, Mathew (January 9, 2007). "Apple unveils iPhone". Macworld. International Data Group. Archived from the original on January 26, 2017. Retrieved April 1, 2017.
  15. ^ Block, Ryan (January 9, 2007). "Live from Macworld 2007: Steve Jobs keynote". Engadget. AOL. Archived from the original on March 24, 2017. Retrieved April 1, 2017.
  16. ^ Wright, Mic (September 9, 2015). "The original iPhone announcement annotated: Steve Jobs' genius meets Genius". The Next Web. Archived from the original on April 1, 2017. Retrieved April 1, 2017.
  17. ^ "iOS: A visual history". The Verge. Vox Media. September 16, 2013. Archived from the original on April 12, 2017. Retrieved April 1, 2017.
  18. ^ Gonsalves, Antone (October 11, 2007). "Apple Launches iPhone Web Apps Directory". InformationWeek. UBM plc. Archived from the original on February 20, 2017. Retrieved April 1, 2017.
  19. ^ "Jobs' original vision for the iPhone: No third-party native apps". 9to5Mac. October 21, 2011. Archived from the original on April 1, 2017. Retrieved April 1, 2017.
  20. ^ Fletcher, Nik (October 17, 2007). "Apple: "we plan to have an iPhone SDK in developers' hands in February"". Engadget. AOL. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  21. ^ Eran Dilger, Daniel (March 7, 2017). "Nine Years of Apple's iOS SDK generated $60 billion, 1.4 million jobs". AppleInsider. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  22. ^ Elmer-DeWitt, Philip (October 17, 2007). "Steve Jobs: Apple Will Open iPhone to 3rd Party Apps in February". Fortune. Time Inc. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  23. ^ Block, Ryan (March 6, 2008). "Live from Apple's iPhone SDK press conference". Engadget. AOL. Archived from the original on January 27, 2017. Retrieved April 1, 2017.
  24. ^ Dalrymple, Jim; Snell, Jason (February 27, 2008). "Apple: iPhone SDK, enterprise announcement next week". Macworld. International Data Group. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  25. ^ Ricker, Thomas (July 10, 2008). "Jobs: App Store launching with 500 iPhone applications, 25% free". Engadget. AOL. Archived from the original on March 30, 2017. Retrieved April 1, 2017.
  26. ^ "App Store Downloads Top 100 Million Worldwide". Apple Press Info. Apple Inc. September 9, 2008. Archived from the original on April 1, 2017. Retrieved April 1, 2017.
  27. ^ Myslewski, Rik (January 16, 2009). "iPhone App Store breezes past 500 million downloads". The Register. Situation Publishing. Archived from the original on May 5, 2017. Retrieved April 1, 2017.
  28. ^ Siegler, MG (June 8, 2009). "State Of The iPhone Ecosystem: 40 Million Devices and 50,000 Apps". TechCrunch. AOL. Archived from the original on June 10, 2009. Retrieved April 1, 2017.
  29. ^ Moren, Dan (November 4, 2009). "App Store officially passes 100,000 app mark". Macworld. International Data Group. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  30. ^ Frommer, Dan (November 4, 2009). "iPhone App Store Passes 100,000 Apps". Business Insider. Axel Springer SE. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  31. ^ Brian, Matt (August 28, 2010). "Apple's App Store Now Features 250,000 Apps". The Next Web. Archived from the original on March 29, 2017. Retrieved March 29, 2017.
  32. ^ Elmer-DeWitt, Philip (August 28, 2010). "Apple App Store: 250,000 and counting". Fortune. Time Inc. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  33. ^ Crook, Jordan (July 24, 2012). "Apple App Store Hits 650,000 Apps: 250,000 Designed For iPad, $5.5B Paid Out To Devs". TechCrunch. AOL. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  34. ^ Ingraham, Nathan (October 22, 2013). "Apple announces 1 million apps in the App Store, more than 1 billion songs played on iTunes radio". The Verge. Vox Media. Archived from the original on May 12, 2017. Retrieved March 29, 2017.
  35. ^ Fiegerman, Seth (October 22, 2013). "Apple's App Store Tops 1 Million Apps". Mashable. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  36. ^ a b Golson, Jordan (June 13, 2016). "Apple's App Store now has over 2 million apps". The Verge. Vox Media. Archived from the original on February 10, 2017. Retrieved March 29, 2017.
  37. ^ Beck, Kellen (June 13, 2016). "Apple's App Store now has over 2 million apps". Mashable. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  38. ^ Carson, Erin (June 13, 2016). "Apple by the numbers: 2 million apps, 15 million Apple Music subscribers". CNET. CBS Interactive. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  39. ^ Goode, Lauren (January 5, 2017). "Apple's App Store just had the most successful month of sales ever". The Verge. Vox Media. Archived from the original on January 28, 2017. Retrieved March 29, 2017.
  40. ^ Dignan, Larry (January 5, 2017). "Apple's App Store 2016 revenue tops $28 billion mark, developers net $20 billion". ZDNet. CBS Interactive. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  41. ^ Kastrenakes, Jacob (March 21, 2016). "There are now 1 million iPad apps". The Verge. Vox Media. Archived from the original on March 30, 2017. Retrieved April 1, 2017.
  42. ^ Perez, Sarah (August 10, 2016). "App Store to reach 5 million apps by 2020, with games leading the way". TechCrunch. AOL. Archived from the original on March 30, 2017. Retrieved March 29, 2017.
  43. ^ Bangeman, Eric (September 17, 2007). "The iPod meets the iPhone: a review of the iPod touch". Ars Technica. Condé Nast. Archived from the original on June 18, 2016. Retrieved June 21, 2017.
  44. ^ Miller, Dan (January 27, 2010). "Apple announces iPad". Macworld. International Data Group. Archived from the original on July 3, 2017. Retrieved June 21, 2017.
  45. ^ Tartakoff, Joseph (June 7, 2010). "Apple Avoids iPhone-Like Trademark Battle Thanks To Cisco, FaceTime Deals". paidContent. Archived from the original on May 11, 2011. Retrieved February 2, 2011.
  46. ^ Juli Clover (October 5, 2016). "Apple's First iOS Developer Academy Opens October 6 at University of Naples". MacRumors. Archived from the original on December 23, 2016. Retrieved December 22, 2016.
  47. ^ Mike Wuerthele (October 5, 2016). "Apple's first European iOS Developer Academy opening on Thursday in Naples, Italy". AppleInsider. Archived from the original on December 21, 2016. Retrieved December 22, 2016.
  48. ^ "App Store – Support – Apple Developer". Apple Inc. Archived from the original on November 1, 2017. Retrieved January 8, 2019.
  49. ^ Caldwell, Serenity (October 15, 2011). "Up close with iOS 5: Wireless syncing and updating". Macworld. International Data Group. Archived from the original on August 8, 2017. Retrieved June 20, 2017.
  50. ^ Clover, Juli (September 17, 2018). "Apple Releases iOS 12 With Faster Performance, Memoji, Siri Shortcuts, Screen Time, Revamped Maps App, ARKit 2.0, and More". MacRumors. Archived from the original on September 17, 2018. Retrieved September 18, 2018.
  51. ^ Axon, Samuel (September 17, 2018). "iOS 12, thoroughly reviewed". Ars Technica. Condé Nast. Archived from the original on September 17, 2018. Retrieved September 18, 2018.
  52. ^ "About that $20 upgrade..." CNET. CBS Interactive. January 15, 2008. Archived from the original on October 31, 2017. Retrieved June 20, 2017.
  53. ^ Dalrymple, Jim (February 7, 2008). "Accounting rules behind iPod touch update charge". Macworld. International Data Group. Archived from the original on July 8, 2017. Retrieved June 20, 2017.
  54. ^ Oliver, Sam (June 25, 2009). "Upgrade fee sees few iPod touch users updating to 3.0 software". AppleInsider. Archived from the original on March 5, 2017. Retrieved June 20, 2017.
  55. ^ Foresman, Chris (September 14, 2009). "Accounting rules change could end iPod touch update fee". Ars Technica. Condé Nast. Archived from the original on July 8, 2017. Retrieved June 20, 2017.
  56. ^ Elmer-DeWitt, Philip (September 14, 2009). "Accounting rule change in Apple's favor". Fortune. Time Inc. Archived from the original on July 11, 2017. Retrieved June 20, 2017.
  57. ^ "Home button – Apple". help.apple.com. Retrieved May 24, 2015.
  58. ^ "About iOS passcodes – Apple Support". support.apple.com. Archived from the original on April 28, 2015. Retrieved May 24, 2015.
  59. ^ "Apple's iOS 7 brings quick Spotlight search access to every app page". AppleInsider. June 10, 2013. Archived from the original on October 7, 2013. Retrieved September 18, 2013.
  60. ^ "Search on iPad with iOS 7". October 21, 2013. Archived from the original on January 13, 2015. Retrieved March 1, 2014.
  61. ^ "Hands-on with the new, proactive Spotlight in iOS 9". September 16, 2015. Archived from the original on October 19, 2015. Retrieved October 17, 2015.
  62. ^ Seifert, Dan (September 13, 2016). "iOS 10 will make you love your lock screen". The Verge. Vox Media. Archived from the original on February 10, 2017. Retrieved April 1, 2017.
  63. ^ Matthias Böhmer, Antonio Krüger. A Study on Icon Arrangement by Smartphone Users Archived May 12, 2013, at the Wayback Machine. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13). ACM, New York, NY, USA, 2137–2146.
  64. ^ Gruber, John (June 29, 2010). "4". Daring Fireball. Archived from the original on October 9, 2017. Retrieved October 15, 2017.
  65. ^ Stinson, Elizabeth (June 9, 2015). "Why Apple abandoned the world's most beloved typeface". Wired. Condé Nast. Archived from the original on June 13, 2015. Retrieved October 15, 2017.
  66. ^ Koetsier, John (July 9, 2013). "Apple 'fontgate' ends with thicker Helvetica Neue in iOS 7 beta 3". VentureBeat. Archived from the original on October 15, 2017. Retrieved October 15, 2017.
  67. ^ Guarino, Sarah (September 21, 2013). "iOS 7 How-to: Make text more readable/larger on your iPad and iPhone". 9to5Mac. Archived from the original on July 31, 2016. Retrieved October 15, 2017.
  68. ^ Kazmucha, Allyson (November 20, 2013). "How to increase or decrease font sizes on iPhone and iPad in iOS 7 with Dynamic Type". iMore. Archived from the original on May 8, 2017. Retrieved October 15, 2017.
  69. ^ Strange, Adario (September 17, 2015). "All hail Apple's new iOS 9 font, San Francisco". Mashable. Archived from the original on December 21, 2017. Retrieved October 15, 2017.
  70. ^ "Apple drops Helvetica for San Francisco in iOS 9". AppleInsider. September 16, 2015. Archived from the original on March 6, 2017. Retrieved October 15, 2017.
  71. ^ a b Frakes, Dan (June 21, 2010). "Hands on with iOS 4 folders". Macworld. International Data Group. Archived from the original on November 1, 2017. Retrieved October 15, 2017.
  72. ^ Friedman, Lex (June 20, 2011). "How to create and organize iOS folders". Macworld. International Data Group. Archived from the original on October 15, 2017. Retrieved October 15, 2017.
  73. ^ Costello, Sam (March 20, 2017). "How Many Apps and Folders Can an iPhone Have?". Lifewire. Dotdash. Archived from the original on August 6, 2017. Retrieved October 15, 2017.
  74. ^ Miller, Chance (July 8, 2015). "iOS 9 lets you store 105 more apps per folder on the iPad". 9to5Mac. Archived from the original on October 15, 2017. Retrieved October 15, 2017.
  75. ^ "iPhone 4S – Always know what's up in Notification Center". Apple Inc. Archived from the original on February 14, 2012.
  76. ^ Tanasychuk, Mike (September 15, 2016). "How to use VoiceOver on iPhone and iPad". iMore. Archived from the original on December 20, 2016. Retrieved March 31, 2017.
  77. ^ Tibken, Shara (March 25, 2016). "Seeing eye phone: Giving independence to the blind". CNET. CBS Interactive. Archived from the original on April 1, 2017. Retrieved March 31, 2017.
  78. ^ Tibken, Shara (November 3, 2016). "Apple iPhone tech helps reinvent the hearing aid". CNET. CBS Interactive. Archived from the original on April 1, 2017. Retrieved March 31, 2017.
  79. ^ Wing Kosner, Anthony (August 16, 2014). "Made For iPhone Hearing Aids: Hands On With Halo, A Mission-Critical Wearable". Forbes. Archived from the original on April 1, 2017. Retrieved March 31, 2017.
  80. ^ Aquino, Steven (June 26, 2016). "Accessibility was all around this year's WWDC". TechCrunch. AOL. Archived from the original on April 1, 2017. Retrieved March 31, 2017.
  81. ^ Kornowski, Liat (May 2, 2012). "How the Blind Are Reinventing the iPhone". The Atlantic. Atlantic Media. Archived from the original on April 1, 2017. Retrieved March 31, 2017.
  82. ^ Aquino, Steven (May 19, 2016). "When it comes to accessibility, Apple continues to lead in awareness and innovation". TechCrunch. AOL. Archived from the original on April 1, 2017. Retrieved March 31, 2017.
  83. ^ "iOS 4 iPhone Update RELEASED: A Guide To iOS 4". The Huffington Post. June 21, 2010. Archived from the original on December 29, 2011. Retrieved April 13, 2013.
  84. ^ Albanesius, Chloe (June 21, 2010). "Apple iPhone iOS 4 Software Update Expected Monday". PC Magazine. Archived from the original on June 23, 2014. Retrieved April 14, 2013.
  85. ^ a b Cheng, Jacqui (June 21, 2010). "Ars reviews iOS 4: what's new, notable, and what needs work". Ars Technica. Condé Nast. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  86. ^ Ray, Bill (November 22, 2010). "iOS 4.2 multi-tasking comes to the iPad". The Register. Archived from the original on June 13, 2013. Retrieved April 14, 2013.
  87. ^ "iOS: Understanding multitasking". Apple. Archived from the original on September 6, 2013. Retrieved September 14, 2013.
  88. ^ Newman, Jared (June 22, 2010). "Multitasking With iOS 4 is Horrible: Apple Blew It". PC World. Archived from the original on June 29, 2013. Retrieved April 14, 2013.
  89. ^ "iOS 4 walkthrough". June 14, 2010. Archived from the original on June 15, 2010. Retrieved June 14, 2010.
  90. ^ "Apple announces multitasking for iPhone OS 4 (iPhone 3GS/iPod touch G3 only)". April 8, 2010. Archived from the original on June 13, 2010. Retrieved June 14, 2010.
  91. ^ a b c d e f g h i "iOS Application Programming Guide – Background Execution". Developer.apple.com. Archived from the original on July 27, 2015. Retrieved September 4, 2015.
  92. ^ Yoni Heisler (June 12, 2013). "Jon Rubinstein: OS X and iOS 7 borrow features from webOS". Archived from the original on September 28, 2013. Retrieved September 23, 2013.
  93. ^ Prabhu, Gautam. "iOS 9 vs. iOS 8: A look at the UI changes in iOS 9". iPhone Hacks. Archived from the original on November 7, 2015. Retrieved September 20, 2015.
  94. ^ "iOS: Force an app to close". Apple Inc. Archived from the original on September 30, 2012. Retrieved October 9, 2012.
  95. ^ "iOS 7 multitasking". Tuaw. September 18, 2013. Archived from the original on February 21, 2014. Retrieved March 21, 2014.
  96. ^ Snell, Jason (April 8, 2010). "Inside iPhone 4.0's multitasking". Macworld. Archived from the original on May 30, 2013. Retrieved April 14, 2013.
  97. ^ German, Kent (June 23, 2010). "Apple iPhone 4 AT&T review". CNET. CBS Interactive. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  98. ^ Hollington, Jesse (June 21, 2010). "Instant Expert: Secrets & Features of iOS 4". iLounge. Archived from the original on December 21, 2012. Retrieved April 14, 2013.
  99. ^ Schonfeld, Erick (February 4, 2010). "Siri's IPhone App Puts A Personal Assistant In Your Pocket". TechCrunch. AOL. Archived from the original on July 28, 2017. Retrieved June 21, 2017.
  100. ^ Wortham, Jenna (April 29, 2010). "Apple Buys a Start-Up for Its Voice Technology". The New York Times. Archived from the original on July 28, 2017. Retrieved June 21, 2017.
  101. ^ Marsal, Katie (April 28, 2010). "Apple acquires Siri, developer of personal assistant app for iPhone". AppleInsider. Archived from the original on May 27, 2017. Retrieved June 21, 2017.
  102. ^ Rao, Leena (April 28, 2010). "Confirmed: Apple Buys Virtual Personal Assistant Startup Siri". TechCrunch. AOL. Archived from the original on June 23, 2017. Retrieved June 21, 2017.
  103. ^ Golson, Jordan (October 4, 2011). "Siri Voice Recognition Arrives On the iPhone 4S". MacRumors. Archived from the original on July 28, 2017. Retrieved June 21, 2017.
  104. ^ Velazco, Chris (October 4, 2011). "Apple Reveals Siri Voice Interface: The "Intelligent Assistant" Only For iPhone 4S". TechCrunch. AOL. Archived from the original on July 28, 2017. Retrieved June 21, 2017.
  105. ^ Kumparak, Greg (October 4, 2011). "The Original Siri App Gets Pulled From The App Store, Servers To Be Killed". TechCrunch. AOL. Archived from the original on August 31, 2012. Retrieved June 21, 2017.
  106. ^ Purewal, Sarah Jacobsson; Cipriani, Jason (February 16, 2017). "The complete list of Siri commands". CNET. CBS Interactive. Archived from the original on June 24, 2017. Retrieved June 21, 2017.
  107. ^ Sumra, Husain (June 13, 2016). "Apple Opens Siri to Third-Party Developers With iOS 10". MacRumors. Archived from the original on July 28, 2017. Retrieved June 21, 2017.
  108. ^ Olivarez-Giles, Nathan (June 13, 2016). "Apple iOS 10 Opens Up Siri and Messages, Updates Music, Photos and More". The Wall Street Journal. Dow Jones & Company. Archived from the original on July 28, 2017. Retrieved June 21, 2017. (subscription required)
  109. ^ Matney, Lucas (June 5, 2017). "Siri gets language translation and a more human voice". TechCrunch. AOL. Archived from the original on June 15, 2017. Retrieved June 21, 2017.
  110. ^ Gartenberg, Chaim (June 5, 2017). "Siri on iOS 11 gets improved speech and can suggest actions based on how you use it". The Verge. Vox Media. Archived from the original on June 19, 2017. Retrieved June 21, 2017.
  111. ^ a b c "What's New in iOS 4". Apple. Archived from the original on June 17, 2010. Retrieved June 14, 2010.
  112. ^ "Apple's Game Center debuts next week – Game Hunters: In search of video games and interactive awesomeness". USA Today. January 9, 2010. Archived from the original on May 25, 2012. Retrieved September 1, 2010.
  113. ^ Holt, Chris. "iOS 4.1's GameCenter to Hit iPhone Next Week – PCWorld Business Center". Pcworld.com. Retrieved September 1, 2010.
  114. ^ "iOS 4.2 Software Update for iPad". Apple Inc. Archived from the original on March 6, 2013. Retrieved October 9, 2012.
  115. ^ "Game Center". Apple. December 23, 2010. Archived from the original on December 23, 2010.
  116. ^ A. Usman (October 31, 2012). "How to Install Game Center on iPhone 3G [Guide]". Shoutpedia.
  117. ^ Wollman, Dana (September 10, 2013). "iOS 7 will be 64-bit, just like the iPhone 5s' new A7 chip". Engadget. Archived from the original on September 24, 2015.
  118. ^ Souppouris, Aaron (September 12, 2013). "Why Apple's 64-bit iPhone chip is a bigger deal than you think". The Verge. Archived from the original on April 28, 2017.
  119. ^ Cunningham, Andrew (July 2, 2015). "The state of the 64-bit transition in iOS, and what's left to be done". Ars Technica. Archived from the original on January 31, 2017.
  120. ^ Cunningham, Andrew (June 5, 2017). "iOS 11 drops the iPhone 5 and 5C and the fourth-gen iPad". Ars Technica. Archived from the original on June 5, 2017.
  121. ^ Mayo, Benjamin (June 6, 2017). "32-bit apps will not launch on iOS 11, Mac App Store transition to 64-bit from 2018". 9to5Mac. Archived from the original on June 20, 2017.
  122. ^ Cunningham, Andrew (April 13, 2017). "What the death of 32-bit iOS could mean for Apple's hardware and software". Ars Technica. Archived from the original on April 29, 2017.
  123. ^ a b "Jobs' original vision for the iPhone: No third-party native apps". 9to5Mac. October 21, 2011. Archived from the original on June 11, 2017. Retrieved June 21, 2017.
  124. ^ Duncan, Geoff (October 17, 2007). "Apple confirms iPhone SDK coming next year". Digital Trends. Archived from the original on August 28, 2017. Retrieved June 21, 2017.
  125. ^ "Steve Jobs confirms native iPhone SDK by February". AppleInsider. October 17, 2007. Archived from the original on August 28, 2017. Retrieved June 21, 2017.
  126. ^ Dalrymple, Jim (March 6, 2008). "Apple unveils iPhone SDK". Macworld. International Data Group. Archived from the original on August 28, 2017. Retrieved June 21, 2017.
  127. ^ Block, Ryan (March 6, 2008). "Live from Apple's iPhone SDK press conference". Engadget. AOL. Archived from the original on June 14, 2017. Retrieved June 21, 2017.
  128. ^ a b c Guevin, Jennifer (March 6, 2008). "FAQ: What does the iPhone SDK mean?". CNET. CBS Interactive. Archived from the original on September 13, 2016. Retrieved June 21, 2017.
  129. ^ a b Kim, Arnold (March 6, 2008). "Apple Releases iPhone SDK, Demos Spore, Instant Messaging". MacRumors. Archived from the original on March 11, 2016. Retrieved June 21, 2017.
  130. ^ Mayo, Benjamin (September 11, 2015). "Apple now allowing developers to submit iOS 9, OS X El Capitan and native Watch apps to the App Store". 9to5Mac. Archived from the original on August 22, 2016. Retrieved June 21, 2017.
  131. ^ Sande, Steven (June 10, 2013). "New iOS SDK features for developers". Engadget. AOL. Archived from the original on January 15, 2018. Retrieved June 21, 2017.
  132. ^ Sinicki, Adam (June 9, 2016). "Developing for Android vs developing for iOS – in 5 rounds". Android Authority. Archived from the original on June 26, 2017. Retrieved June 21, 2017.
  133. ^ Paul, Ryan (September 15, 2009). "MonoTouch drops .NET into Apple's walled app garden". Ars Technica. Condé Nast. Archived from the original on November 22, 2015. Retrieved June 21, 2017.
  134. ^ Dove, Jackie (April 11, 2010). "Adobe unleashes Creative Suite 5". Macworld. International Data Group. Archived from the original on September 24, 2014. Retrieved June 21, 2017.
  135. ^ "StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share". statcounter.com. Archived from the original on May 26, 2012. Retrieved February 19, 2017.
  136. ^ "iOS leapfrogs Android with 410 million devices sold and 650,000 apps". InsideMobileApps. July 24, 2012. Archived from the original on July 27, 2012. Retrieved July 24, 2012.
  137. ^ Ingraham, Nathan (June 2, 2014). "Apple has sold more than 800 million iOS devices, 130 million new iOS users in the last year". The Verge. Vox Media. Archived from the original on February 10, 2017. Retrieved April 1, 2017.
  138. ^ Rossignol, Joe (January 27, 2015). "Tim Cook: Apple Has Sold More Than 1 Billion iOS Devices". MacRumors. Archived from the original on June 23, 2016. Retrieved June 21, 2017.
  139. ^ Kahn, Jordan (January 27, 2015). "Apple announces 1 billion iOS devices sold". 9to5Mac. Archived from the original on July 4, 2017. Retrieved June 21, 2017.
  140. ^ Saylor, Michael (2012). The Mobile Wave: How Mobile Intelligence Will Change Everything. Vanguard Press. p. 33. ISBN 1-59315-720-7.
  141. ^ "Android and iOS Squeeze the Competition, Swelling to 96.3% of the Smartphone Operating System Market for Both 4Q14 and CY14, According to IDC" (Press release). IDC. February 24, 2015. Archived from the original on February 25, 2015.
  142. ^ "Worldwide Tablet Growth Hits the Brakes, Slowing to the Low Single Digits in the Years Ahead, According to IDC" (Press release). IDC. March 12, 2015. Archived from the original on March 13, 2015.
  143. ^ "StatCounter Global Stats: Top 7 Mobile Operating Systems on Feb 2015". Archived from the original on May 26, 2012. Retrieved March 6, 2015.
  144. ^ Sui, Linda (November 2, 2016). "Strategy Analytics: Android Captures Record 88 Percent Share of Global Smartphone Shipments in Q3 2016". Strategy Analytics. Archived from the original on November 27, 2016. Retrieved November 27, 2016.
  145. ^ Rossignol, Joe (November 2, 2016). "iOS Adoption Remains at Lowest Levels Since 2014 as Android Captures Record 87.5% Market Share". MacRumors. Archived from the original on November 27, 2016. Retrieved November 27, 2016.
  146. ^ Ricker, Thomas (July 10, 2007). "iPhone Hackers: "we have owned the filesystem"". Engadget. AOL. Archived from the original on April 1, 2017. Retrieved April 1, 2017.
  147. ^ Healey, Jon (August 6, 2007). "Hacking the iPhone". Los Angeles Times. Archived from the original on November 6, 2007. Retrieved August 6, 2007.
  148. ^ "Apple's Joswiak: We Don't Hate iPhone Coders". September 11, 2007. Archived from the original on February 20, 2017. Retrieved February 19, 2017.
  149. ^ Baig, Edward C. (June 26, 2007). "Apple's iPhone isn't perfect, but it's worthy of the hype". USA Today. Archived from the original on June 29, 2007. Retrieved June 28, 2007.
  150. ^ IPad, MAX (May 6, 2010). "Jailbreaking Explained". IPad Forums. Archived from the original on November 2, 2012. Retrieved November 4, 2012.
  151. ^ Kravets, David (July 26, 2010). "U.S. Declares iPhone Jailbreaking Legal, Over Apple's Objections". Wired. Archived from the original on July 31, 2012. Retrieved December 13, 2011.
  152. ^ "U.S. Copyright Office Final 2010 Anti-Circumvention Rulemaking" (PDF). U.S. Copyright Office. July 27, 2010. Archived (PDF) from the original on May 1, 2012. Retrieved August 21, 2012.
  153. ^ Mobile, Know Your (May 19, 2010). "Locked / Unlocked – a definition of the terms Locked and Unlocked from the Know Your Mobile mobile phone glossary". Know Your Mobile. Archived from the original on August 31, 2012. Retrieved November 4, 2012.
  154. ^ "AT&T – What are the eligibility requirements for unlocking iPhone?". AT&T. Archived from the original on August 3, 2012. Retrieved August 21, 2012.
  155. ^ "iPhone: About unlocking". Apple Inc. Website. May 22, 2012. Archived from the original on October 17, 2012. Retrieved August 21, 2012.
  156. ^ "iPhone: Wireless Carrier Support and Features". Apple Inc. Website. April 12, 2013. Archived from the original on April 24, 2013. Retrieved May 13, 2013.
  157. ^ "New iPhones use LTE on any American carrier, despite the way they're listed". MacWorld. October 9, 2015. Archived from the original on July 13, 2017. Retrieved October 19, 2017.
  158. ^ "Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issues". Apple Inc. Website. February 9, 2013. Archived from the original on May 10, 2013. Retrieved May 13, 2013.
  159. ^ "iPad DRM endangers our rights". Archived from the original on April 12, 2012.
  160. ^ Anderson, Nate (January 27, 2010). "Protestors: iPad is nothing more than a golden calf of DRM". Ars Technica. Condé Nast. Archived from the original on April 2, 2017. Retrieved April 1, 2017.
  161. ^ "Mobile Devices and the Next Computing Revolution". February 3, 2010. Archived from the original on December 1, 2010. Retrieved June 9, 2010.
  162. ^ Bobbie Johnson (February 1, 2010). "Apple iPad will choke innovation, say open internet advocates". The Guardian. Archived from the original on March 16, 2014. Retrieved February 7, 2010.
  163. ^ "Microsoft PR spokesman condemns iPad for being "locked down"". Archived from the original on March 5, 2012.
  164. ^ "Apple's Trend Away From Tinkering". Slashdot. January 31, 2010. Archived from the original on February 8, 2010. Retrieved June 9, 2010.
  165. ^ Steve Wozniak (Interviewee) (January 22, 2011). Campus Party Brasil 2011 – Geek Pride e Wozniak. Fragoso, Victor. Archived from the original on May 12, 2011. Retrieved March 7, 2011.
  166. ^ Leander Kahney (January 30, 2010). "Pundits On The iPad's Closed System: It's Doom For PCs, No It's Great". Archived from the original on May 15, 2010. Retrieved June 9, 2010.
  167. ^ Available in iOS 5 to iOS 7 via General > About > Diagnostics & Usage > Diagnostics & Usage Data >(date and time).panic.plist, after a kernel crash
    Available in iOS 8 to iOS 10 via Privacy > Diagnostics & Usage > Diagnostics & Usage Data > JetsamEvent-(date and time).ips, when low in memory
    Available in iOS 11 and 12 via Privacy > Analytics > Analytics Data > JetsamEvent-(date and time).ips, when low in memory
  168. ^ a b c d e f g h i j Apple Inc. (May 2016). "iOS Security Guide" (PDF). apple.com. Archived (PDF) from the original on February 27, 2016.
  169. ^ "ASLR – The iPhone Wiki". www.theiphonewiki.com. Archived from the original on December 23, 2016. Retrieved December 6, 2016.
  170. ^ "Crypto-shredding using effaceable storage in iOS on stanford.edu". Archived from the original on September 11, 2018. Retrieved September 21, 2018.
  171. ^ "iOS Keychain Services Tasks". developer.apple.com. Archived from the original on December 20, 2016. Retrieved December 6, 2016.
  172. ^ "Two-factor authentication for Apple ID". Apple Support. Archived from the original on December 20, 2016. Retrieved December 6, 2016.
  173. ^ Apple Inc., Newsroom Archive - Apple, Retrieved June 7, 2018.
  174. ^ Mactracker (mactracker.ca), Apple Inc. model database, version as of 26 July 2007.

Further reading

  • Hillegass, Aaron; Conway, Jon (March 22, 2012). iOS Programming: The Big Nerd Ranch Guide (3rd ed.). Pearson. p. 590. ISBN 978-0-321-82152-2.
  • Turner, Kirby (December 19, 2011). Learning iPad Programming: A Hands-on Guide to Building iPad Apps with iOS 5 (1st ed.). Pearson. p. 816. ISBN 978-0-321-75040-2.
  • Mark, Dave; LaMarche, Jeff (July 21, 2009). Beginning iPhone 3 Development: Exploring the iPhone SDK (1st ed.). Apress. p. 584. ISBN 1-4302-2459-2.
  • Mark, Dave; LaMarche, Jeff (December 29, 2009). More iPhone 3 Development: Tackling iPhone SDK 3 (1st ed.). Apress. p. 552. ISBN 1-4302-2505-X.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=IOS&oldid=877359790"