Change UIAlertController tintColor globally Xcode 11/iOS13

Question

Changing the tintColor of the UIAlertController s used to be possible to change via the window 's tintColor . This was usually done in the AppDelegate and it would affect UIAlertController s tintColor as well. Unfortunately in projects started with Xcode 11 for iOS SDK 13 there is no window in the AppDelegate anymore.

Where do I need to set the tintColor , so that all UIAlertController s use it?

Things I tried:

• setting the tintColor of the first UIViewController 's .view.window . Unfortunately the window is nil .
• setting the main Storyboard's globalTint color. This affects the navigation bars and is also inherited by other UI elements, but not by the UIAlertController.
• It would be an option to write an extension to the UIAlertController. But this not the clean way. There must be a better way.
• I checked several answers to similar questions but for older Xcode versions. The answers do not apply.

Thank you for your help!

Answer 1

Try this to get access to the window using windowScene for iOS 13+:

let windowScene = UIApplication.shared
                .connectedScenes
                .filter { $0.activationState == .foregroundActive }
                .first
if let windowScene = windowScene as? UIWindowScene {
    window = UIWindow(windowScene: windowScene) // now you've access to the window
}