AVPlayer not working properly - Swift - swift

Question

//Firstly my English very bad, I'm sorry...
I'm implementing AVPlayer my app. Player is working fine but if I play another videos many times Player is not working and only just this screen looks.
Here's my code
let player:AVPlayer?
override func viewDidLoad() {
super.viewDidLoad()
let videoFile = object?.objectForKey("video") as? PFFile
videoFile?.getFilePathInBackgroundWithBlock({ (filePath, error) in
if error == nil {
let videoURL = NSURL(fileURLWithPath: filePath!)
self.player = AVPlayer(URL: videoURL)
let playerController = AVPlayerViewController()
playerController.player = self.player
playerController.showsPlaybackControls = false
playerController.videoGravity = AVLayerVideoGravityResizeAspectFill
playerController.view.frame = self.videoView.bounds
self.videoView.addSubview(playerController.view)
self.addChildViewController(playerController)
self.player!.play()
} else {
print(error)
}
})
}

Answer 1

I don't understand the way you fetch the video object but you can try the following code. It works fine.
var player:AVPlayer! // this shouldn't be let.
override func viewDidLoad() {
super.viewDidLoad()
let query = PFQuery(className:"TestClass") //your classname in parse. Change it with your clas name
query.getObjectInBackgroundWithId("SALe4gX2nk") { // get the video file with id. Change it with your id.
(object: PFObject?, error: NSError?) -> Void in
let videoFile = object?.objectForKey("video") as? PFFile
let url = NSURL(string: (videoFile?.url)!)
self.player = AVPlayer(URL: url!)
let playerController = AVPlayerViewController()
playerController.player = self.player
playerController.showsPlaybackControls = false
playerController.videoGravity = AVLayerVideoGravityResizeAspectFill
playerController.view.frame = self.view.bounds
self.view.addSubview(playerController.view)
self.addChildViewController(playerController)
self.player!.play()
}
}