Pass view hit-test

/// Passes user input to main window if user taps on view of type PassView
/// Any other view added to this UIWindow will be visible and interactable over the main UIWindow
public class OverlayWindow: UIWindow {

    override public func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        if let hitView = super.hitTest(point, with: event), !hitView.isKind(of: PassView.self) {
            return hitView
        } else {
            return nil
        }
    }
}