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UIWindow Presentation Context - Get top most presented UIViewController of UIWindow
// https://hashaam.com/2017/08/31/uiwindow-presentation-context/
extension UIWindow {
func presentationContext(context: UIViewController? = nil) -> UIViewController? {
var presentationContextViewController = rootViewController
if let context = context {
presentationContextViewController = context
}
if presentationContextViewController?.presentedViewController == nil {
if let navigationController = presentationContextViewController as? UINavigationController {
return navigationController.topViewController
}
return presentationContextViewController
}
return presentationContext(context: presentationContextViewController?.presentedViewController)
}
}
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