UIWindow not showing over content in iOS 13

Question

I am upgrading my app to use the new UIScene patterns as defined in iOS 13, however a critical part of the app has stopped working. I have been using a UI

Answer 1

Thank you @glassomoss. My problem is with UIAlertController.

I solved my problem in this way:

• I added a variable

var windowsPopUp: UIWindow?

• I modified the code to display the PopUp:

public extension UIAlertController {
    func showPopUp() {
        windowsPopUp = UIWindow(frame: UIScreen.main.bounds)
        let vc = UIViewController()
        vc.view.backgroundColor = .clear
        windowsPopUp!.rootViewController = vc
        windowsPopUp!.windowLevel = UIWindow.Level.alert + 1
        windowsPopUp!.makeKeyAndVisible()
        vc.present(self, animated: true)
    }
}

• In the action of the UIAlertController I added:

windowsPopUp = nil

without the last line the PopUp is dismissed but the windows remains active not allowing the iteration with the application (with the application window)