title: Detect the click event of the "Done" button (youtube video)
body: <p>I have an UIViewController (in my swift application) containing a different elements between them a button. When the button is clicked a create an UIWebView, add it to the subView then a load  a youtube video inside it. When the video is fullscreen, I want to dismiss the webView when the "Done" button is clicked. I searched a lot but I didn't find what I'm looking for. 
  Can anyone help me please?</p>