Detect when a webview video becomes fullscreen on ios8

Question

I have an app where users can open videos from UIWebview, including Youtube ones. In iOS7, I was able to get a notification when it started playing, or when it became full s

Answer 1

Swift 5.1:

NotificationCenter.default.addObserver(
    forName: UIWindow.didResignKeyNotification,
    object: self.view.window,
    queue: nil
) { notification in
    print("Video is now fullscreen")
}

NotificationCenter.default.addObserver(
    forName: UIWindow.didBecomeKeyNotification,
    object: self.view.window,
    queue: nil
) { notification in
    print("Video stopped")
}