iOS编程——AVPlayer解决闪屏问题

问题终于解决，选用AVPlayer，重置一下AVPlayerItem就不会出现闪屏现象，注册一个通知同样可以实现循环播放，而且AVPlayer可以自定义播放样式，给了我们更大的发挥空间，完全可以自己DIY播放器样式。并且AVPlayer完全可以实现两个视频窗口播放！

1.需要引入两个类库：

在.h中引入

#import <AVFoundation/AVFoundation.h>

在.m中引入

#import <CoreMedia/CoreMedia.h>

代码如下：

- (void)viewDidLoad{    [super viewDidLoad];            UIButton * rightBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];    rightBtn.frame = CGRectMake(50, 420, 180, 50);    [rightBtn addTarget:self action:@selector(doRight) forControlEvents:UIControlEventTouchUpInside];    [rightBtn setTitle:@"同时播放" forState:UIControlStateNormal];    [self.view addSubview:rightBtn];                    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"找朋友" ofType:@"mp4"];    NSURL *sourceMovieURL = [NSURL fileURLWithPath:filePath];    AVAsset *movieAsset = [AVURLAsset URLAssetWithURL:sourceMovieURL options:nil];    AVPlayerItem * playerItem = [AVPlayerItem playerItemWithAsset:movieAsset];    self.player_0 = [AVPlayer playerWithPlayerItem:playerItem];    AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:_player_0];    playerLayer.frame = CGRectMake(0, 0, 400, 500);    playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;    [self.view.layer addSublayer:playerLayer];        [_player_0 play];        //注册通知    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(runLoopTheMovie:) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];            }- (void)doRight{        NSString *filePath = [[NSBundle mainBundle] pathForResource:@"字母歌" ofType:@"mp4"];    NSURL *sourceMovieURL = [NSURL fileURLWithPath:filePath];    AVAsset *movieAsset = [AVURLAsset URLAssetWithURL:sourceMovieURL options:nil];    AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:movieAsset];    self.player_1 = [AVPlayer playerWithPlayerItem:playerItem];    AVPlayerLayer * playerLayer = [AVPlayerLayer playerLayerWithPlayer:_player_1];     playerLayer.frame = CGRectMake(420, 0, 400, 500);    playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;    [self.view.layer addSublayer:playerLayer];        [_player_1 play];        }- (void)runLoopTheMovie:(NSNotification *)n{    //注册的通知  可以自动把 AVPlayerItem 对象传过来，只要接收一下就OK        AVPlayerItem * p = [n object];    //关键代码     [p seekToTime:kCMTimeZero];        [_player_0 play];    NSLog(@"重播");}

Demo链接：http://download.csdn.net/detail/u012405234/6614853

运行环境：Xcode 4.6.3 ARC