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While developing iOS application in Xcode 11 I've changed deployment target to iOS 12. So all this code with SceneDelegate and scene sessions that is for new multi-window support is now unavailable. So I've commented it out totally.

But no I have such bug

There is no scene delegate set. A scene delegate class must be specified to use a main storyboard file.

And when I try to access self.window!.rootViewController to attach some initial UIViewController (it is also defined in Main.storyboard with isInitial attribute checked)

rmaddy
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Michał Ziobro
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  • Also relevant: https://stackoverflow.com/questions/56916948/xcode-11-backward-compatibility-uiwindowscene-is-only-available-in-ios-13-or-n – DoesData Oct 22 '19 at 14:39

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