AVPlayer 去黑边

    varbgView=UIView()

    var palyerItem :AVPlayerItem?

    varplayer:AVPlayer?

    var playerLayer :AVPlayerLayer?

//创建媒体资源管理对象

        self.palyerItem = AVPlayerItem(url: URL.init(fileURLWithPath: urlString))

        //创建ACplayer：负责视频播放

        self.player = AVPlayer.init(playerItem: self.palyerItem!)

        self.player?.rate = 1.0//播放速度 播放前设置

        //创建显示视频的图层

        self.playerLayer?.backgroundColor = UIColor.init(hex: "#FFFFFF").cgColor

        self.playerLayer = AVPlayerLayer.init(player: self.player)

        self.playerLayer?.borderColor = UIColor.init(hex: "#FFFFFF").cgColor

        playerLayer?.shadowColor = UIColor.init(hex: "#FFFFFF").cgColor

        self.playerLayer?.videoGravity = .resizeAspect

        if zIsiPad {

            self.playerLayer?.frame = CGRect.init(x: 0, y: 0, width: 700, height: 900)

        } else {

            self.playerLayer?.frame = CGRect.init(x: 0, y: 0, width: 375, height: 500)

        }

        self.playerLayer?.shouldRasterize = true

        self.playerLayer?.rasterizationScale = UIScreen.main.scale

        self.bgView.layer.addSublayer(self.playerLayer!)

        //播放

        self.player?.play()