ios - Avplayer 不播放来自 url 的视频

Question

当我尝试从 url 播放视频时，AVPlayer 不播放视频。但是当我尝试下载并播放视频时，它正在播放。我做错了什么？

self.avAsset = AVAsset(URL: NSURL(string: contentURLString)!)
 let item = AVPlayerItem(asset: avAsset)
            avPlayer = AVPlayer(playerItem: item)
            playerLayer = AVPlayerLayer(player: avPlayer)
            playerLayer.frame = self.view.frame
            playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
            cell.videoView.layer.addSublayer(playerLayer)
            self.avPlayer.seekToTime(kCMTimeZero)
            avPlayer.play()

Answer 1

除非服务器支持 Http Range: 参数，否则 AVplayer 不会播放远程 url 视频。否则显示空白黑屏