iOS开发中AVPlayer的简单应用

//引入系统文件

#import

#import

@interfaceViewController ()

/**

 * 控制视频播放的控件

 */

@property(weak, nonatomic) IBOutlet UISlider *progressSlider;

/**

 * 声明播放视频的控件属性[既可以播放视频也可以播放音频]

 */

@property(nonatomic,strong)AVPlayer *player;

/**

 * 播放的总时长

 */

@property(nonatomic,assign)CGFloat sumPlayOperation;

@end

@implementationViewController

- (void)viewDidLoad {

 [superviewDidLoad];

 // Do any additional setup after loading the view, typically from a nib.

 //设置播放的url

 NSString *playString = @"http://static.tripbe.com/videofiles/20121214/9533522808.f4v.mp4";

 NSURL *url = [NSURL URLWithString:playString];

 //设置播放的项目

 AVPlayerItem *item = [[AVPlayerItem alloc] initWithURL:url];

 //初始化player对象

 self.player = [[AVPlayer alloc] initWithPlayerItem:item];

 //设置播放页面

 AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:_player];

 //设置播放页面的大小

 layer.frame = CGRectMake(0,0, [UIScreen mainScreen].bounds.size.width,300);

 layer.backgroundColor = [UIColor cyanColor].CGColor;

 //设置播放窗口和当前视图之间的比例显示内容

 layer.videoGravity = AVLayerVideoGravityResizeAspect;

 //添加播放视图到self.view

 [self.view.layer addSublayer:layer];

 //设置播放进度的默认值

 self.progressSlider.value =0;

 //设置播放的默认音量值

 self.player.volume =1.0f;

}

#pragma mark - 开始按钮响应方法

- (IBAction)startPlayer:(id)sender {

 [self.player play];

}

#pragma mark - 暂停按钮响应方法

- (IBAction)stopPlayer:(id)sender {

 [self.player pause];

}

#pragma mark - 改变进度

- (IBAction)changeProgress:(id)sender {

 self.sumPlayOperation = self.player.currentItem.duration.value/self.player.currentItem.duration.timescale;

 //CMTimeMake(a,b) a表示当前时间，b表示每秒钟有多少帧

 [self.player   seekToTime:CMTimeMakeWithSeconds(self.progressSlider.value*self.sumPlayOperation,  self.player.currentItem.duration.timescale) completionHandler:^(BOOL  finished) {

  [self.player play];

 }];

}