ios - 如何更改AVPlayer的视频方向？

我想使用AVPlayer旋转视频的重播。有没有办法将其顺时针旋转90度？
这是一些代码:

self.player = AVPlayer(URL: NSURL(fileURLWithPath: dataPath))
playerLayer = AVPlayerLayer.init(player: self.player)
playerLayer.frame = view.bounds

playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
view.layer.addSublayer(playerLayer)
player.play()

这个作品:

self.player = AVPlayer(URL: NSURL(fileURLWithPath: dataPath))
playerLayer = AVPlayerLayer.init(player: self.player)
playerLayer.setAffineTransform(CGAffineTransformMakeRotation(CGFloat(M_PI))
playerLayer.frame = view.bounds
playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
view.layer.addSublayer(playerLayer)
player.play()

最佳答案

Hooni在Swift 3中回答:

let affineTransform = CGAffineTransform(rotationAngle: degreeToRadian(90))
avPlayerLayer.setAffineTransform(affineTransform)

func degreeToRadian(_ x: CGFloat) -> CGFloat {
    return .pi * x / 180.0
}