Ensure Swift code samples are Swift 6 compatible

[loic-sharma]

What information needs to be added?

Swift 6 language mode enables strict concurrency checking. Code changes may be necessary for Swift code to be compatible with the Swift 6 language mode.

WWDC session: https://www.youtube.com/watch?v=75-c6jSE8kU
Migration docs: https://www.swift.org/migration/documentation/swift-6-concurrency-migration-guide/swift6mode/

See also:

• Migrate packages to Swift 6 language mode flutter#150388
• Update samples repo to Swift 6 flutter#150939

Where should this new content appear?

The following pages should be checked for Swift 6 compatibility:

• https://docs.flutter.dev/add-to-app/ios/add-flutter-screen
• https://docs.flutter.dev/get-started/flutter-for/swiftui-devs
• https://docs.flutter.dev/platform-integration/ios/app-extensions
• https://docs.flutter.dev/platform-integration/ios/platform-views
• https://docs.flutter.dev/platform-integration/platform-channels#step-4-add-an-ios-platform-specific-implementation
• ... more?

I would like to fix this problem.

• I will try and fix this problem on docs.flutter.dev.

[parlough]

Thanks for the issue @loic-sharma! If any of these samples (or others) do need changes to account for the strict concurrency checks, can those adjustments be made in a way that's still compatible with Swift 6? Or are there occasionally new language features or libraries required?

Either way, I imagine it's unlikely for any of the few short snippets on the site to hit this.