如何更改AVPlayer的视频方向？

Question

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？
下面是一些代码：

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() 

UPDATE

这一个工程：

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() 

Answer 1

如果您正在使用的Objective-C，下面的代码会有所帮助。

示例代码：

#define degreeToRadian(x) (M_PI * x/180.0) 
#define radianToDegree(x) (180.0 * x/M_PI) 

- (void)rotateVideoPlayerWithDegree:(CGFloat)degree { 
    [_playerLayer setAffineTransform:CGAffineTransformMakeRotation(degreeToRadian(degree))]; 
} 

Answer 2

Hooni答案斯威夫特3：

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

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