How to detect fullscreen mode using AVPlayerViewController in Swift?

Question

I am trying to detect when the AVPlayerViewController is in full-screen mode, but I\'m having a difficult time achieving this. I\'d like to know when the user s

Answer 1

Starting from iOS 12 we can use these AVPlayerViewControllerDelegate delegate methods :

func playerViewController(AVPlayerViewController, willBeginFullScreenPresentationWithAnimationCoordinator: UIViewControllerTransitionCoordinator)
func playerViewController(AVPlayerViewController, willEndFullScreenPresentationWithAnimationCoordinator: UIViewControllerTransitionCoordinator)

Answer 2

In iOS11 your screen's safe area will drop to 0 in the event of an AVPlayer going fullscreen. Though it might be an undocumented feature (and therefor potential bug). I am having a hard time finding more info on it.

[UIApplication sharedApplication].keyWindow.safeAreaLayoutGuide.layoutFrame.size.height == 0?

Answer 3

Your code helped me handle switching between full screen and back.

But for the identification part, I just changed it slightly to my requirement.

let rect = change!["new"] as! NSValue

if let playerRect: CGRect = rect.CGRectValue() as CGRect {         
   if playerRect.size == UIScreen.mainScreen().bounds.size {
      print("Video in full screen")
   } else {
      print("Video not in full screen")
   }
}

Hope this helps.

Answer 4

This is a slightly optimized Swift 4.2 version of @Pangu's answer. It only detects the change, otherwise the observer is called also when interacting with the video like fast forwarding. I also replaced the "videoBounds" with the AVPlayerViewController.videoBounds keypath to avoid the string and use the window bounds to determine if it's fullscreen or not.

avPlayerViewController.addObserver(self, forKeyPath: #keyPath(AVPlayerViewController.videoBounds), options: [.old, .new], context: nil)

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey: Any]?, context: UnsafeMutableRawPointer?) {
    if keyPath == #keyPath(AVPlayerViewController.videoBounds) {
        // detect only changes
        if let oldValue = change?[.oldKey] as? CGRect, oldValue != CGRect.zero, let newValue = change?[.newKey] as? CGRect {
            // no need to track the initial bounds change, and only changes
            if !oldValue.equalTo(CGRect.zero), !oldValue.equalTo(newValue) {
                if newValue.size.height < UIScreen.main.bounds.height {
                   print("normal screen")
                } else {
                   print("fullscreen")
                }
            }
        }
    }
}

Answer 5

Updated for Swift 3:

Add an observer for the playerViewController object:

playerViewController(self, forKeyPath: "videoBounds", options: NSKeyValueObservingOptions.new, context: nil)

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?)
{
    if keyPath == "videoBounds"
    {
        if let rect = change?[.newKey] as? NSValue
        {
            if let newrect = rect.cgRectValue as CGRect?
            {
                // 200 is height of playerViewController in normal screen mode
                if newrect.size.height <= 200
                {
                    print("normal screen")
                }
                else
                {
                    print("full screen")
                }
            }
        }
    }
}