I'm using Core Data with Cloud Kit, and have therefore to check the iCloud user status during application startup. In case of problems I want to issue a dialog to the user, and I do it using UIApplication.shared.keyWindow?.rootViewController?.present(...)
up to now.
In Xcode 11 beta 4, there is now a new deprecation message, telling me:
'keyWindow' was deprecated in iOS 13.0: Should not be used for applications that support multiple scenes as it returns a key window across all connected scenes
How shall I present the dialog instead?
The accepted answer, while ingenious, might be overly elaborate. You can get exactly the same result much more simply:
UIApplication.shared.windows.filter {$0.isKeyWindow}.first
I would also caution that the deprecation of keyWindow
should not be taken overly seriously. The full warning message reads:
'keyWindow' was deprecated in iOS 13.0: Should not be used for applications that support multiple scenes as it returns a key window across all connected scenes
So if you are not supporting multiple windows on iPad there is no objection to going ahead and continuing to use keyWindow
.