targetContentIdentifier on NSUserActivity nil on Handoff

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Created Jul ’21

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I am using scenes and setting up Handoff between a Mac and iPad/iOS application. Whenever I receive the user activity on the iPad, targetContentIdentifier is always nil. I've confirmed that things like userInfo and persistentIdentifier are coming through by outputting them in func scene(_ scene: UIScene, continue userActivity: NSUserActivity), but without the targetContentIdentifier is always empty. Without it, I can't use the activation condition's and proper scene isn't being selected by iOS... is there something beyond setting it and marking an activity as eligible for handoff that I am missing?

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Answer 1

kpuchar OP

May ’22

I can observe the same effect when restoring scenes after app being closed (by user or through crash) on iPad simulator, iOS 15.5. Scenario is as follows:

Start new scene with activity containing targetContentIdentifier
Send scene to background -> stateRestorationActivity(for:) is called, where activity scene was started with is returned (targetContentIdentifier is still there).
App crashes
App is restarted, but activity received in scene(:willConnectTo:options:) does not have anymore targetContentIdentifier in session.stateRestorationActivity.

Can anyone comment on that - is this correct behaviour or is this a bug?

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