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

//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];

    }];

     

}