KaiOelfke / SampleRestore

iOS Scene based restoration Sample project

TLDR:

func scene(_ scene: UIScene, didUpdate userActivity: NSUserActivity) doesn’t get called apparently.

Using the responder mechanism or alternativeResponder breaks scene and view ctrl values. The delegate seems to be reliable.

We can either use the responder, altResponder and delegate mechanisms or scene, view controller and delegate calls.

Test results

[.responder, .sceneDelegate, .userActivityDelegate, .viewController]

Has scene value	false
Has delegate value	true
Has responder value	true
Has view ctrl value	false

Missing view ctrl and scene value ❌

[.sceneDelegate]

Has scene value	true
Has delegate value	false
Has responder value	false
Has view ctrl value	false

Matches flags ✅

[.viewController]

Has scene value	false
Has delegate value	false
Has responder value	false
Has view ctrl value	true

Matches flags ✅

[.responder]

Has scene value	false
Has delegate value	false
Has responder value	true
Has view ctrl value	false

Matches flags ✅

[.userActivityDelegate]

Has scene value	false
Has delegate value	true
Has responder value	false
Has view ctrl value	false

Matches flags ✅

[.sceneDelegate, .userActivityDelegate, .viewController]

Has scene value	true
Has delegate value	true
Has responder value	false
Has view ctrl value	true

Matches flags ✅

[.responder, .viewController]

Has scene value	false
Has delegate value	false
Has responder value	true
Has view ctrl value	false

Missing view ctrl ❌

[.responder, .sceneDelegate]

Has scene value	false
Has delegate value	false
Has responder value	true
Has view ctrl value	false

Missing scene value ❌

[.alternativeResponder]

Has scene value	false
Has delegate value	false
Has responder value	false
Has view ctrl value	false
Has alt responder value	true

Matches flags ✅

[.alternativeResponder, .sceneDelegate, .viewController]

Has scene value	false
Has delegate value	false
Has responder value	false
Has view ctrl value	false
Has alt responder value	true

Missing scene and view ctrl value ❌

[.alternativeResponder, .responder, .userActivityDelegate]

Has scene value	false
Has delegate value	true
Has responder value	true
Has view ctrl value	false
Has alt responder value	true

Matches flags ✅

[.viewController, .sceneDelegate, .userActivityDelegate]

Has scene value	true
Has delegate value	true
Has responder value	false
Has view ctrl value	true
Has alt responder value	false

Matches flags ✅