Opt out of UISceneDelegate/SwiftUI on iOS

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While you should embrace using scenes when your app is run under iOS 13 and later, you can fully opt out while you still support iOS 12 or earlier.

  • Completely remove the “Application Scene Manifest” entry from Info.plist.

  • If there is a scene delegate class, remove it.

  • If there are any scene related methods in your app delegate, remove those methods.

  • If missing, add the property var window: UIWindow? to your app delegate.

Your app should now only use the app delegate and under iOS 13 it should have the same life cycle as iOS 12.

Note: None of this is specific to Swift or SwiftUI.

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