iOS 11 SDK Release Notes
iOS 11 SDK provides support for developing iOS apps. It’s packaged with a complete set of Xcode tools, compilers, and frameworks for creating apps for iOS, watchOS, tvOS, and macOS. These tools include the Xcode IDE and the Instruments analysis tool, among many others.
With this software you can develop apps for iPhone, iPad, or iPod touch running iOS 11. You can also test your apps using the included iOS Simulator, which supports iOS 11. iOS 11 SDK requires a Mac computer running macOS Sierra 10.12.6 or later.
This version of iOS is intended for installation only on devices registered with the Apple Developer Program. Attempting to install this version of iOS in an unauthorized manner could put your device in an unusable state.
Tools and Developer Resources
You obtain Xcode 9 from the Mac App Store. It is a free download that installs directly into the Applications folder. By default, Xcode downloads developer documentation in the background for offline reading; it also automatically downloads documentation updates. This behavior can be changed after installation using the Downloads preferences pane.
The Apple Developer Program provides access to the App Store, Mac App Store, and Apple TV App Store, additional support and documentation, and signing resources for testing and deployment on Apple TV, Apple Watch, iPad, iPhone, and iPod touch devices. For more information, visit the Apple Developer Program website.
Apple provides the following web resources to support development in iOS:
Apple Developer Forums. Participate in discussions about developing for Apple platforms and using developer tools.
Bug Reporter. Report issues, enhancement requests, and feedback to Apple. Provide detailed information, including the system and developer tools version information, and any relevant crash logs or console messages.
Apple Developer website. Get the latest development in formation as well as technical documentation for Xcode.
iOS homepage. Get high-level information about the latest release of iOS. Download current and beta iOS releases.
For help with using Xcode, choose Help > Xcode Help.
For issues not mentioned in Notes and Known Issues, please file bugs through the Apple Developer website https://developer.apple.com/bug-reporting/.
When filing a bug, please include the full version number in the bug title and in the description. To find the version number, open Settings > General > About. The version number is shown next to Version and looks like 11.0 (15Axxx).
Additionally, you may discuss these issues and iOS 11 SDK in the Apple Developer Forums: https://forums.developer.apple.com/welcome. To get more information about iCloud for Developers, go to https://developer.apple.com/icloud.
Release Notes Updates
iOS Release Notes is sometimes updated after a release is distributed. You can check for the most up-to-date version of iOS Release Notes at the Apple Developer website by checking http://developer.apple.com/go/?id=ios-sdk-release-notes.
Revision: iOS1100 - IRN1
Notes and Known Issues
The following items relate to using iOS 11 SDK to develop code.
32-bit apps no longer run on iOS 11.
To include a 32-bit slice in your app, target iOS 10 or earlier.
Restoring from an iTunes backup containing an offloaded app which is also present in the iTunes library installs the offloaded app and then re-installs it from the App Store. This can result in the restored backup taking more space on your device than the size of the backup. (31461664)
Workaround: After the restore completes, offload the app.
Some accounts using a phone number as the Apple ID may be unable to add certain payment types. (31677442)
Continuing from a breakpoint while debugging an
ARSessionmay result in VIO breaking. Any visual objects placed in the world/anchor are not visible. (31561202)
Still capture requests fail and the video stream stops producing a buffer when using the
720p30video format with the
Depth values in the non default
160x90depth data formats are half of the expected values, and disparity values are twice the expected value. (32363942)
CloudKit doesn't support
unsigned long longvalues with the high-order bit set. (30567424)
Applications that use
CKModifyRecordsOperationshould specify an appropriate value for
CKModifyRecordsOperation.isAtomic. If your client is compiled against iOS 11, operations enqueued against the default
CKRecordZonehave new behavior because
trueby default. If the operation hits a "preflight" failure (most commonly, a network issue uploading a
CKAsset, or a malformed
CKRecord), the entire operation is canceled. (30838858)
Storing data to a non default event store in EventKit may not work. (31335830)
Files App (Simulator)
In Simulator, documents saved in Local Storage won't load again through the Document Browser. (32947101)
startSecureConnectionto establish a secure connection.
In iOS 11,
Workaround: In Settings > Wi-Fi, tap the Info button for the desired network and turn off “HTTP Proxy: Configure Proxy”.
requestPersonalizationTokenForClientTokenis deprecated in iOS 11. Use
VNFaceLandmarkRegion2Dis currently unavailable in Swift. (33191123)
Facial landmarks identified by the Vision framework may flicker in temporal use cases such as video. (32406440)
Debugging a disabled Messages extension may cause the Messages app to crash. (33657938)
Workaround: Enable the extension before starting the debug session.
After a simulated iOS device starts up, it’s not possible to pull down the Notification center. (33274699)
Workaround: Lock and unlock the simulated device and then reopen Home screen.