系统视频播放器——AVPlayerItem AVPlayer AVPlayerLayer

- 日理万妓 2022-03-30 04:20 239阅读 0赞

使用`AVPlayerItem` `AVPlayer` `AVPlayerLayer`实现视频播放功能

需要导入头文件`#import <AVKit/AVKit.h>`

效果图  
![在这里插入图片描述][20190104192901530.gif]  
代码示例

// 定义
    @property (nonatomic, strong) AVPlayer *avPlayer;
    
    @property (nonatomic, strong) UILabel *timeLabel;
    @property (nonatomic, strong) UISlider *sliderView;

//
        NSString *string = [[NSBundle mainBundle] pathForResource:@"movie" ofType:@"mp4"];
        NSURL *videoUrl = [NSURL fileURLWithPath:string];
        // 创建AVPlayerItem
        AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:videoUrl];
        //2.把AVPlayerItem放在AVPlayer上
        self.avPlayer = [[AVPlayer alloc] initWithPlayerItem:playerItem];
        //3 再把AVPlayer放到 AVPlayerLayer上
        AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.avPlayer];
        [self.view.layer addSublayer:playerLayer];
        playerLayer.frame = CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.width);
    
        //
        self.timeLabel = [[UILabel alloc] initWithFrame:CGRectMake(20.0, (self.view.frame.size.width + 20.0), (self.view.frame.size.width - 40.0), 40)];
        [self.view addSubview:self.timeLabel];
        self.timeLabel.backgroundColor = [UIColor greenColor];
        self.timeLabel.textColor = [UIColor blackColor];
        //
        self.sliderView = [[UISlider alloc] initWithFrame:CGRectMake(self.timeLabel.frame.origin.x, (self.timeLabel.frame.origin.y + self.timeLabel.frame.size.height + 20.0), self.timeLabel.frame.size.width, 10.0)];
        [self.view addSubview:self.sliderView];
        self.sliderView.backgroundColor = [UIColor orangeColor];
        self.sliderView.value = 0.0;
        [self.sliderView addTarget:self action:@selector(sliderClick:) forControlEvents:UIControlEventValueChanged];
        //
        AVPlayerVC __weak *weakSelf = self;
        [self.avPlayer addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
            //当前播放的时间
            NSTimeInterval currentTime = CMTimeGetSeconds(time);
            //视频的总时间
            NSTimeInterval totalTime = CMTimeGetSeconds(weakSelf.avPlayer.currentItem.duration);
            //设置滑块的当前进度
            weakSelf.sliderView.value = currentTime / totalTime;
            //设置显示的时间：以00:00:00的格式
            weakSelf.timeLabel.text = [weakSelf formatTimeWithTimeInterVal:currentTime];
        }];

// 交互
    - (void)stopClick
    {
        [self.avPlayer pause];
    }
    
    - (void)playClick
    {
        [self.avPlayer play];
    }
    
    - (void)pauseClick
    {
        [self.avPlayer pause];
    }
    
    - (void)sliderClick:(UISlider *)slider
    {
        if (self.avPlayer.status == AVPlayerStatusReadyToPlay) {
            NSTimeInterval playTime = slider.value * CMTimeGetSeconds(self.avPlayer.currentItem.duration);
            CMTime seekTime = CMTimeMake(playTime, 1);
            [self.avPlayer seekToTime:seekTime completionHandler:^(BOOL finished) {
                
            }];
        }
    }
    
    //转换时间格式的方法
    - (NSString *)formatTimeWithTimeInterVal:(NSTimeInterval)timeInterVal{
        int minute = 0, hour = 0, secend = timeInterVal;
        minute = (secend % 3600)/60;
        hour = secend / 3600;
        secend = secend % 60;
        return [NSString stringWithFormat:@"%02d:%02d:%02d", hour, minute, secend];
    }

[20190104192901530.gif]: /images/20220330/e12a05e245ae4e7b88a1db99bc6a5579.png