Detect full screen status of video playback in WebView
Background
When you have a web view and the web view contains a video, then the video playback is controlled by web view instance. By default, the video playback support in-line and full screen.
in line video playback
full screen video playback
Problem
If you're still trying to support iOS6 or iOS7 at this moment, then you might face a problem related to the presenting ViewController's rotation status if your app supports more than one orientation.
- View controller A contains web view B
- Web view B displays a page with video inside
- User taps the video, and the video start to playback
- User taps the full screen button like
- User rotates the device in full screen
- User dismiss the video playback full screen
- User saw your presenting view controller A's layout is not updated
Solutions
The solution is to get the notification when video playback exits full screen. So far, we have 3 solutions.
In iOS8, the video playback view controller will present the video on top of your current view hierarchy, but, before iOS8, the video playback is presented as a model view controller
Use undocumented notifications
@"UIMoviePlayerControllerDidExitFullscreenNotification" is an undocumented notification emitted by UIWebView, similar to MPMoviePlayerControllerDidExitFullScreenNotification.
This works perfect because this notification is dropped in iOS8, but comes with a risk that it might get rejected!
I haven't tested this in my app.
Use window related notifications
UIWindowDidBecomeVisibleNotification && UIWindowDidBecomeHiddenNotification are officially supported, but the thing is it will make your code more complicated, because the behaviour prior to iOS8 and from iOS8 are different.
Use Javascript
I don't like this solution, but yes, you can, because Mobile Safari will propagate webkitbeginfullscreen & webkitendfullscreen to video tag. To visit the detail, please take a look at this Stack Overflow page.