Xamarin.iOS 12.0 Release Notes
- The latest features and APIs require Xcode 10 GM and the bundled iOS, tvOS and watchOS SDKs
- Apple Xcode 10 requires a Mac running OSX 10.13.6 (High Sierra) or newer
What's New in this Release
Support for Xcode 10
For more information you can consult the Xcode 10 release notes from Apple.
Support for iOS 12
The following new frameworks were added in iOS 12:
Most other frameworks were also updated, including ARKit 2.0 and Siri (Intents) shortcuts. See our API diff to browse the newest API.
For more information you can consult the iOS 12 release notes from Apple.
Support for tvOS 12
The following new frameworks were added in tvOS 12:
Most other frameworks were also updated. See our [API diff](#api-diff to browse the newest API.
For more information you can consult the tvOS 12 release notes from Apple.
Support for watchOS 5
The following new frameworks were added in watchOS 5:
Most other frameworks were also updated. See our API diff to browse the newest API.
For more information you can consult the watchOS 5 release notes from Apple.
The GC pump thread used on simulator builds is now disabled by default. This feature was added, a long time ago, to help diagnose object instances without managed references, where the GC could collect them and cause randomly occurring, hard to diagnose crashes. However it can cause issues when debugging applications. Since several changes over the years made this option less useful it is now disabled and, if needed, can be re-enabled by adding
--debugtrack:true to the mtouch additional arguments of your project's options.
This version of Xamarin.iOS correspond to our
xcode10 milestone and is based of the stable 15.8 release.
- September 19, 2018 - Xamarin.iOS 18.104.22.168
- September 11, 2018 - Xamarin.iOS 22.214.171.124
Earlier release notes, for Xamarin.iOS previews for Xcode 10 betas, are located in Xamarin.iOS 11.99.
September 19, 2018 - Xamarin.iOS 126.96.36.199
This release is based on the Xcode 10 final release.
- 4818 - [clockkit] Add missing 'CLKComplicationFamily' enum values
September 11, 2018 - Xamarin.iOS 188.8.131.52
This release is based on the Xcode 10 GM seed.
64 bits watchOS support
Xcode 10 GM added support for 64 bits watch application, aka
arm64_32. The current app store submission process requires this architecture to be included in your application when including watch support. You can workaround this with [https://github.com/xamarin/xamarin-macios/issues/4810#issuecomment-421338365](these instructions).
Trying to run a watch app on the new Series 4 Apple Watch will fail with this error:
IncorrectArchitecture: Failed to find matching arch for 32-bit Mach-O input file ... error MT1006: Could not install the application 'MyTestApp.app' on the device 'MyDevice': AMDeviceSecureInstallApplicationBundle returned: 0xe8000087 (kAMDIncorrectArchitectureError).
This is because the S4 device can only execute native
armv7klike previous watches.
Please read https://github.com/xamarin/xamarin-macios/issues/4864 for more information and a workaround.
Apple Breaking Changes
- Apple removed support for
stdlibc++. Using C++ code now requires the use of
- Apple removed support to build watchOS 1.x applications.
- rdar://41123682 Apple changed
TVElementUpdateType*enum values. Please test your application if you're usinf this type.
- rdar://43425168 Apple changed
IN*WorkoutIntentResponseCodeenum values. Please test your application if you're usinf this type.
Apple Non-Breaking Issues
- Apple deprecated OpenGLES and related API in favor of Metal.
RPBroadcastPickerViewsymbol is not present in simulator. If needed you'll need to test this on devices.
- Disabling the managed linker for device builds can generate object files that are too big for the 32bits native linker
ldto process properly. The workaround is to enable the managed linker (e.g. Link SDK) on your projects.
Using an older Xcode version
Using an older Xcode version (than the one mentioned in the above requirements) is often possible, but some features may not be available. Also, some limitations might require workarounds, e.g.:
- The static registrar requires Xcode headers files to build applications, leading to
MT4109errors if API are missing. In most cases enabling the managed linker will help (by removing the API).
The following documents contains a complete list of the API changes since the Xamarin.iOS 11.14 stable release:
Your feedback is important to us. If there are any problems with this release, check the Xamarin.iOS Forums and Github Issues for existing issues. If you do not find any matching issue, please feel free to start a new discussion and report an issue.
Xamarin.iOS is based on the following open-source repositories: