Displays the black screen just before the video is loaded - swift

Question

I have 1 AVPlayerViewController and AVPlayer I added the video to it and it worked. But when starting to load video there is a problem that a black screen appears for about 0.5s then the new video can start. I have added AVPlayerViewController to a UIView. I have looked at the background for the UIView medium with the color of the video but every time it loads it displays a black screen then it can start the video. can someone help me. this is my code
class WalkViewController: UIViewController{
#IBOutlet weak var view_player: UIView!
var avPlayer: AVPlayer!
let avPlayerController = AVPlayerViewController()
var sourc_video : String!
var filepath: String!
var fileURL: NSURL!
override func viewDidLoad() {
//video view payer
self.filepath = NSBundle.mainBundle().pathForResource(arr_video[0], ofType: "mp4")
self.fileURL = NSURL.init(fileURLWithPath:filepath!)
self.avPlayer = AVPlayer(URL: fileURL)
self.avPlayerController.player = avPlayer
self.avPlayerController.view.frame = CGRect(x: 0, y: 0, width: 316, height: 316)
self.avPlayerController.showsPlaybackControls = false
self.avPlayerController.player?.play()
avPlayerController.prepareForInterfaceBuilder()
self.addChildViewController(avPlayerController)
self.view_player.addSubview(avPlayerController.view)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}

Answer 1

First of all, your code is wrong. You must call didMoveToParentViewController after putting a child view controller’s view into the interface.
Second, video takes time to prepare. Put the view into the interface but hide it. Use KVO to observe isReadyForDisplay. When it becomes true, now show the view.