Question

我必须检测视频是处于播放还是缓冲模式。我正在从URL加载视频。我已经尝试了下面的代码，我可以在视频开始播放后跟踪，但不能在它处于缓冲状态时跟踪。
另外，我想在播放器中添加叠加视图。我试图在AVPlayer中添加叠加层，但在全屏模式下叠加层消失。

需要一些建议。提前致谢。以下是我的代码：

    let playerAV = AVPlayerViewController()
    var player = AVPlayer()
    player = AVPlayer(URL: url)
    print(url)
    playerAV.player = player
    playerAV.view.frame = CGRectMake(0, 0,  self.videoView.frame.width,  self.videoView.frame.height)
    self.addChildViewController(playerAV)
    self.videoView.addSubview(playerAV.view)
    playerAV.didMoveToParentViewController(self)
    playerAV.player?.play()
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ChannelDetailViewController.notificationObserver(_:)), name:AVPlayerItemDidPlayToEndTimeNotification , object: player.currentItem)
        _ = UIDevice.beginGeneratingDeviceOrientationNotifications
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ChannelDetailViewController.deviceOrientationDidChange(_:)) , name:
        UIDeviceOrientationDidChangeNotification, object: nil)
    player.addObserver(self, forKeyPath: "rate", options: NSKeyValueObservingOptions.New, context: nil)
  player.addPeriodicTimeObserverForInterval(CMTime(value: 1, timescale: 3), queue: dispatch_get_main_queue()) { [weak self] time in
    self?.handlePlayerStatus(time)
  }

  func handlePlayerStatus(time: CMTime) {
     if player.status == .ReadyToPlay {
     // buffering is finished, the player is ready to play
     print("playing")
  }
  if player.status == .Unknown{
    print("Buffering")
  }
 }

 override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
    if keyPath == "rate" {
        if let rate = change?[NSKeyValueChangeNewKey] as? Float {
          if player.currentItem!.status == AVPlayerItemStatus.ReadyToPlay{
            if rate != 0 && player.error == nil {

              print("normal playback")
            }
            else{
              print("playback stopped")
            }

          }else if player.currentItem?.status == AVPlayerItemStatus.Unknown{
            print("test")
          }
        }
    }
    print("you are here")
}

check here for project

Answer 1

检查我的答案：https://stackoverflow.com/a/38867386/5109911，这会告诉您如何检查播放器是否正在加载缓冲区，检查是否已准备好播放，您必须同时检查player.currentItem.status和{{ 1}}
要向AVPlayer添加叠加层，我建议您在AVPlayer图层上方使用player.status。

Answer 2

我对类似的问题采取了稍微不同的方法 - 当AVPlayer开始实际播放时更新UI（在我们的例子中，它是音频播放，但同样的原则适用）。

我们使用边界时间在播放开始时执行一个块 - 特别是在播放的1/3秒后 - 在可听回放的同时更新UI：

let times = [NSValue(time:CMTimeMake(1,3))]
_ = self.player.addBoundaryTimeObserver(forTimes: times, queue: DispatchQueue.main, using: {
    [weak self] time in
    // Code to update the UI goes here, e.g.
    self?.someUIView.isHidden = false
})

我在公司博客上详细介绍了该方法（以及示例Xcode项目）：http://www.artermobilize.com/blog/2017/02/09/detect-when-ios-avplayer-finishes-buffering-using-swift/

关于问题＃2，我同意Marco的建议，即使用UIView覆盖AVPlayer层。

检测AVPlayerViewController是否正在播放视频或缓冲并向播放器添加叠加层

2 个答案: