用于检测全屏或视频大小改变你可以使用KVO作为AVPlayerViewController，代码可以是这样的：

For the detecting the Full screen or video size change you can use KVO for the AVPlayerViewController, code can be like this:

[comPlayerControl .addObserver(self, forKeyPath:"videoBounds" , options: NSKeyValueObservingOptions.New, context: nil)]

override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
           print("KeyPath \(keyPath)")
        if keyPath == "videoBounds" {
            print("New Video Bounds \(change)")
        }
    }

在更改字典你可以检查视频帧/边界变化的变化

In the change dictionary you can check the change in the video frame/bounds change

对于你提到的轮换你可能不得不使用 viewWillTransitionToSize 或 UIDeviceOrientationDidChangeNotification 通知或您可以使用 UIDevice.currentDevice（）检查当前方向。orientation 因为我没有找到任何可以检查正在进行的视频中的更改的方法

For the rotation as you mentioned you may have to use viewWillTransitionToSize or UIDeviceOrientationDidChangeNotification notification or you can check the current orientation using UIDevice.currentDevice().orientation as i didn't find any method which can check the change in the ongoing video

如果您需要检测视频方向，您可以查看以下链接：https://***.com/a/25833399/4557505 ，以及该链接中的其他答案

Still if you need to detect video orientation you may check this link : https://***.com/a/25833399/4557505 , and other answer in that link

要重复播放视频，您可以在代码中将时间设置为零：

For the repeat of the video you can set the time to zero like this in your code:

func playerDidFinishPlaying(notification: NSNotification) {
        if let item = notification.object as? AVPlayerItem {
            item.seekToTime(kCMTimeZero)
            //you may directly play the video or can do further processing
        }
    }

在项目结尾处播放队列中的项目，您可以尝试使用 commmentQueuePlayer.advanceToNextItem（）

to play item in the queue at the end of the item you may try with commmentQueuePlayer.advanceToNextItem()

您可以尝试在 contentOverlayView

let topView = UIView(frame: CGRectMake(0,0, comPlayerControl.view.bounds.width,44))
        topView.backgroundColor = UIColor ( red: 0.5, green: 0.5, blue: 0.5, alpha: 0.379 )
        let btnNext = UIButton(frame:CGRectMake(0,0,80,44))
        btnNext.setTitle("Next", forState:.Normal)
        btnNext.addTarget(self, action:"playNext", forControlEvents:.TouchUpInside)
        btnNext.userInteractionEnabled = true
        btnNext.enabled = true
        topView.addSubview(btnNext)
        comPlayerControl.contentOverlayView?.addSubview(topView) 

更新

对于 observeValueForKeyPath ，您可以尝试这样的事情

For the observeValueForKeyPath you may try something like this

var avWidth:CGFloat = 0
var avHeight:CGFloat = 0

override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
    if keyPath == "videoBounds" {
        let rect = change!["new"]! as! NSValue

        if let newrect = rect.CGRectValue() as CGRect? {
            if newrect.width > 0 || newrect.height > 0 {
                if avWidth > 0 || avHeight > 0 {
                    if newrect.width > avWidth || newrect.height > avHeight {
                        print("Full Screen")
                    } else if newrect.width < avWidth || newrect.height < avHeight {
                        print("Normal screen")
                    } else {

                    }
                }
                avWidth = newrect.width
                avHeight = newrect.height
            }
        }
    }
}