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.t**r*ipbe.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];

}];

}