swiftios13uiwindowuiscene

How to resolve: 'keyWindow' was deprecated in iOS 13.0

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

screnshot

How shall I present the dialog instead?

Solution

  • This is my solution:

    let keyWindow = UIApplication.shared.connectedScenes
        .filter({$0.activationState == .foregroundActive})
        .compactMap({$0 as? UIWindowScene})
        .first?.windows
        .filter({$0.isKeyWindow}).first

    Usage e.g.:

    keyWindow?.endEditing(true)