Question

我在swift UIview中有一个功能，可以制作2 mp4的循环。第一个mp4正常，但第二个没有，它似乎只播放一次，我怎么能解决这个问题？

let videoURL: NSURL = NSBundle.mainBundle().URLForResource(instrumentaimp4[skaicius], withExtension: "mp4")!
        let sakeleURL: NSURL = NSBundle.mainBundle().URLForResource("sakele_blikas", withExtension: "mp4")!

        player = AVPlayer(URL: videoURL)
        player?.actionAtItemEnd = .None
        player?.muted = true

        sakele = AVPlayer(URL: sakeleURL)
        sakele?.actionAtItemEnd = .None
        sakele?.muted = true


        let playerLayer = AVPlayerLayer(player: player)
        playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
        playerLayer.zPosition = 1

        let playerLayer2 = AVPlayerLayer(player: sakele)
        playerLayer2.videoGravity = AVLayerVideoGravityResizeAspectFill
        playerLayer2.zPosition = 1



        view.layer.addSublayer(playerLayer2)
        view.layer.addSublayer(playerLayer)

        player?.play()
        sakele?.play()


        //loop video
        NSNotificationCenter.defaultCenter().addObserver(self,
            selector: "loopVideo:",
            name: AVPlayerItemDidPlayToEndTimeNotification,
            object:nil)








func loopVideo(notification: NSNotification) {
    if let finishedPlayer = notification.object as! AVPlayerItem!{

        if finishedPlayer == self.sakele {
            self.sakele?.seekToTime(kCMTimeZero)
            self.sakele?.play()
            NSLog("1")
        }else{
            self.player?.seekToTime(kCMTimeZero)
            self.player?.play()
            NSLog("2")}
    }}

NSLog（＆＃34; 2＆＃34;）永远不会发生。我的错误在哪里？任何帮助apreciated

Answer 1

您的sakele是AVPlayer。但是，您的notification.object声称是（并被投射到）AVPlayerItem，然后将其分配给finishedPlayer。这毫无意义。当你来比较if finishedPlayer == self.sakele时，它永远不会成功，因为它们不是对象的种，更不用说同一个对象了。

为什么这个函数中的if语句永远不会成立

1 个答案: