ios之AVPlayer的简单应用

1.引入系统框架

2.创建视频的url

3.创建播放项目

4.初始化播放器

5.设置播放页面

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//引入系统文件 #import <AVFoundation/AVFoundation.h> #import <AVKit/AVKit.h> @interface ViewController () /**  *  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   @implementation ViewController   - (void)viewDidLoad {     [super viewDidLoad];     // 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];     }];       }