视图控制器的对象快速隐藏在视频背景后面答案

【问题标题】：objects of view controller hide behind of video background in swift视图控制器的对象快速隐藏在视频背景后面
【发布时间】：2015-10-10 00:06:23
【问题描述】：

我想为我的应用创建一个登录页面，在这种情况下，我想使用视频作为登录页面的背景，例如 vine、spotify、uber、... 我毫无问题地播放视频并在情节提要中添加一些按钮和标签到我的视图控制器，运行应用程序后我看不到视图控制器的对象我只是看到视频和对象隐藏在视频背景后面如何解决这个问题,,, 感谢您的帮助

这是我播放视频的代码,,,

 lazy var playerLayer:AVPlayerLayer = {

    let player = AVPlayer(URL:  NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("BWWalkthrough", ofType: "mp4")!))
    player.muted = true
    player.allowsExternalPlayback = false
    player.appliesMediaSelectionCriteriaAutomatically = false
    var error:NSError?

    // This is needed so it would not cut off users audio (if listening to music etc.
    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryAmbient)
    } catch var error1 as NSError {
        error = error1
    } catch {
        fatalError()
    }
    if error != nil {
        print(error)
    }

    var playerLayer = AVPlayerLayer(player: player)
    playerLayer.frame = self.view.frame
    playerLayer.videoGravity = "AVLayerVideoGravityResizeAspectFill"
    playerLayer.backgroundColor = UIColor.blackColor().CGColor
    player.play()
    NSNotificationCenter.defaultCenter().addObserver(self, selector:"playerDidReachEnd", name:AVPlayerItemDidPlayToEndTimeNotification, object:nil)
    return playerLayer
    }()


    override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    self.view.layer.addSublayer(self.playerLayer)


}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

override func viewWillDisappear(animated: Bool) {
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

override func willAnimateRotationToInterfaceOrientation(toInterfaceOrientation: UIInterfaceOrientation, duration: NSTimeInterval) {
    playerLayer.frame = self.view.frame
}
func playerDidReachEnd(){
    self.playerLayer.player!.seekToTime(kCMTimeZero)
    self.playerLayer.player!.play()

}

【问题讨论】：

标签： ios swift video viewcontroller

【解决方案1】：

您需要在故事板加载时创建的所有视图下方添加您的playerLayer。更换

self.view.layer.addSublayer(self.playerLayer)

与

self.view.layer.insertSublayer(self.playerLayer, atIndex:0)

应该做这项工作，除非有视图控制器视图的任何子视图您实际上想要位于视频层后面。

【讨论】：