NSString*videoPath = [[NSBundle mainBundle]pathForResource:@"视频名称"ofType:@"mp4"];
NSURL*url = [NSURL fileURLWithPath:videoPath];
AVAsset*asset = [AVAsset assetWithURL:url];
AVPlayerItem *item = [AVPlayerItem playerItemWithAsset:asset];
self.player = [AVPlayer playerWithPlayerItem:item];
AVPlayerLayer*playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
playerLayer.frame=CGRectMake(0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
playerLayer.videoGravity =AVLayerVideoGravityResizeAspectFill;
[self.view.layer addSublayer:playerLayer];
[self.player play];
