如果要设置playerLayer的布局，目前iOS不支持layer设置AutoLayout也不支持autoresizingMask，所以无法给playerLayer设置约束，当然可以采用原始的方法，就是在viewDidLayoutSubviews中再次设置playerLayer的frame，但是这样在屏幕旋转时会有一片短暂的空白区域，虽然很快就消失了，但是这样效果不是很好。
解决方案: 通过UIView来处理，自定义一个UIView的子类，设置这个view的layerClass为AVPlayerLayer类型，然后直接使用这个子类的layer作为AVPlayerLayer，那么此时不需要设置playerLayer的frame，设置这个view的约束或frame即可
以下界面我是通过XIB搭建界面
#import "XYVideoPlayer.h"
#import <AVFoundation/AVFoundation.h>
@implementation XYVideoPlayer
+ (Class)layerClass {
return [AVPlayerLayer class];
}
@end
#import "ViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>
#import "XYVideoPlayer.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet XYVideoPlayer *videoLayer;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.videoLayer.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
self.asset = [AVAsset assetWithURL:videoURL];
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithAsset:self.asset];
self.player = [AVPlayer playerWithPlayerItem:playerItem];
// 将player输出到显示动画层playerLayer
self.playerLayer = (AVPlayerLayer *)self.videoLayer.layer;
[self.playerLayer setPlayer:self.player];
}
Snip20161114_7.png
