所有正在播放的视频都执行了一个AVPlayer的AVPlayerItemDidPlayToEndTime动作

Question

问题：在具有播放器的collectionview单元格中

如果我同时播放两个视频，然后寻找第一个视频结束，然后AVPlayerItemDidPlayToEndTime被解雇两次并重启两个视频

在集合视图单元格中我有

override func awakeFromNib() {
        NotificationCenter.default.addObserver(forName: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: player?.currentItem, queue: .main, using: {[weak self]  (notification) in
            if self?.player != nil {
                self?.player?.seek(to: kCMTimeZero)
                self?.player?.play()
            }
        })
   }

播放视频的播放按钮动作 在单元格中，我有要查找的滑块。

任何帮助将不胜感激

Answer 1

当您注册通知时，请确保player和player?.currentItem不等于nil。对我而言，似乎其中一个是零并且您基本上订阅了所有.AVPlayerItemDidPlayToEndTime通知（因为object为零）。

为避免这种情况，请在将AVAsset分配给播放器后立即订阅通知。

Answer 2

Swift 5.1

将商品作为对象传递

// Stored property
let player = AVPlayer(url: videoUrl)

// When you are adding your video layer
let playerLayer = AVPlayerLayer(player: player)
NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying), name: .AVPlayerItemDidPlayToEndTime, object: player.currentItem)

// add layer to view 

然后，当您收到该通知时，以下是获取currentItem的方法：

// Grab the item from the notification object and ensure its the same item as the current players item
if let item = notification.object as? AVPlayerItem,
    let currentItem = player.currentItem,
    item == currentItem {

    NotificationCenter.default.removeObserver(self, name: .AVPlayerItemDidPlayToEndTime, object: nil)

    // remove player from view or do whatever you need to do here
}