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swift - Swift / Firebase - 在播放之前下载一个 mp4

问题描述

我正在寻找播放我的 mp4 文件（存储在 firebase 存储中）并在它开始播放时启动一个计时器。我的问题是计时器在视频显示在我的屏幕上之前启动。有人知道如何在视频播放后开始计时吗？

这是我的代码，谢谢！

我的变量

var avPlayer:AVPlayer!
    var player:AVPlayer?
    var moviePalyer: AVPlayerLayer?
    var isdone = true
    var previewlayer: AVCaptureVideoPreviewLayer?
    var timer = Timer()

我的代码：

 let url = URL(string:movieURL)
let avPlayer = AVPlayer.init(url: url!)
moviePalyer = AVPlayerLayer.init(player: avPlayer)
moviePalyer?.frame = imageView.bounds
moviePalyer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
previewlayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
 imageView.layer.addSublayer(moviePalyer!)

avPlayer.play()
   self.timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(MyViewController.decreaseTimer), userInfo: nil, repeats: true)
    NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: avPlayer.currentItem, queue: nil, using: { (_) in
                                DispatchQueue.main.async {
                                    if self.isdone == true{
                                        avPlayer.seek(to: kCMTimeZero)
                                        avPlayer.play()

                                    }else {
                                        avPlayer.pause()
                                        self.isdone = false
                                    }
                                }
                            })

标签： swiftfirebaseurlavplayer

解决方案

尝试这个 ：

    NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: avPlayer.currentItem, queue: nil, using: { (_) in
                                DispatchQueue.main.async {
                                    if self.isdone == true{
                                        avPlayer.seek(to: kCMTimeZero)
                                        avPlayer.play()
                                 }else {
                                    avPlayer.pause()

                             self.isdone = false
                                }


                          }
                   DispatchQueue.main.async {
                         self.timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(MyViewController.decreaseTimer), userInfo: nil, repeats: true )
                        }

                        })

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