objects of view controller hide behind of video background in swift - ios

Question

i want create a login page for my app, in this case i want to use a video for background of login page, like vine,spotify,uber,...
i play video without problem and add some button and lable in storyboard to my view controller، after run app i can not see objects of view controller
i just see video and objects hide behind of video background how can fix this problem,,,
thanks for helping
this is my code for playing video,,,
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()
}

Answer 1

You need to add your playerLayer below all the views created when your storyboard loads. Replacing
self.view.layer.addSublayer(self.playerLayer)
with
self.view.layer.insertSublayer(self.playerLayer, atIndex:0)
should do the job, unless there are any subviews of the view controller view that you actually want to be behind the video layer.