How to use AVPlayer with Swift

 classAVPlayerView: UIView {//...(1) Create AVPlayerView by inheriting class from UIView
    required init (coder adecoder:NSCoder) {
        super.init(coder:aDecoder)
    }
    override init (frame:CGRect) {
        super.init (frame:frame)
    }
    override class funclayerClass() - > AnyClass {
        return AVPlayerLayer.self// AV Return only the AVPlayerLayer type itself
    }
}

 override func viewDidLoad(){
        // Generate an asset from the path.
        let path = NSBundle.mainBundle().pathForResource("test", ofType:"mov")
        let fileURL = NSURL (fileURLWithPath:path!)
        let avAsset = AVURLAsset (URL: fileURL, options:nil)
        // Generate items for AVPlayer to play.
        playerItem=AVPlayerItem(asset:avAsset)
        // Generate AVPlayer.
        videoPlayer=AVPlayer(playerItem:playerItem)
        // Generate View.
        let videoPlayerView = AVPlayerView (frame:self.view.bounds)
        　　// vInstantize AVPlayerView with the same size as the view and make it a videoPlayerView
        // Make the layer of the UIView AVPlayerLayer.
        letlayer=videoPlayerView.layer as!AVPlayerLayer
        　　// v Forced downcast videoPlayerView.layer to AVPlayerLayer?
        layer.videoGravity=AVLayerVideoGravityResizeAspect
        layer.player=videoPlayer
        // add layers
        self.view.layer.addSublayer(layer)
・・・