AVPlayer设置从哪儿开始播放

喜欢ヅ旅行 2021-09-11 05:36 309阅读 0赞

# [avplayer 播放视频][avplayer] #

首先介绍几个方法吧和属性吧。

\- (id)addPeriodicTimeObserverForInterval:(CMTime)interval queue:(dispatch\_queue\_t)queue usingBlock:(void (^)(CMTime time))block

这个方法可以用于跟新进度条。

\- (void)seekToTime:(CMTime)time completionHandler:(void (^)(BOOL finished))completionHandler

这个是设置从哪个位置开始播放

CMTime changedTime = CMTimeMakeWithSeconds(timeFloat, 1.0);

获取 CMTime

rate 播放的状态  0 表示暂停  1表示播放

volume 声音

下面是主要的代码

![复制代码][copycode.gif]

1 +(Class)layerClass
     2 {
     3     return [AVPlayerLayer class];
     4 }
     5 
     6 -(void)setMoviePlayer:(AVPlayer *)moviePlayer
     7 {
     8     AVPlayerLayer *layer = (AVPlayerLayer *)[self layer];
     9     layer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    10     layer.player = moviePlayer;
    11 }
    12 
    13 -(AVPlayer *)moviePlayer
    14 {
    15     AVPlayerLayer *layer = (AVPlayerLayer *)[self layer];
    16     return layer.player;
    17 }

![复制代码][copycode.gif]

1 /**
     2  *  初始化视频播放器
     3  *
     4  *  @param movieUrl url网址
     5  */
     6 -(void)setMovieUrl:(NSString *)movieUrl
     7 {
     8     _movieUrl = movieUrl;
     9     _movieItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:movieUrl]];
    10     _moviePlayer = [AVPlayer playerWithPlayerItem:_movieItem];
    11     _moviePlayer.volume = 0.5;
    12     [_voiceView setProgressView:0.5];
    13     _playerLayer.moviePlayer = _moviePlayer;
    14     [self addNotifiction];
    15     [_playerLayer.moviePlayer pause];
    16 }

![复制代码][copycode.gif]

/**
     *  添加监听
     */
    -(void)addNotifiction
    {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackFinishedNotifiction:) name:AVPlayerItemDidPlayToEndTimeNotification object:_playerLayer.moviePlayer.currentItem];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackError:) name:AVPlayerItemNewAccessLogEntryNotification object:_playerLayer.moviePlayer.currentItem];
        [_movieItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];
    }

![复制代码][copycode.gif]

1   //获取播放的进度
     2     AVPlayerItem *mobieItem = _movieItem;
     3     __block LSCacheView * progress = _progressView;
     4     [_moviePlayer addPeriodicTimeObserverForInterval:CMTimeMake(1.0, 1.0) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
     5         float current=CMTimeGetSeconds(time);
     6         float total=CMTimeGetSeconds([mobieItem duration]);
     7         if (current) {
     8             [progress setProgressView:(current/total)];
     9         }
    10     }];

![复制代码][copycode.gif]

if ([keyPath isEqualToString:@"loadedTimeRanges"]) {
            NSTimeInterval timeInterval = [self availableDuration];
            NSTimeInterval cuttTime = CMTimeGetSeconds(_movieItem.currentTime);
            CMTime duration = _movieItem.duration;
            CGFloat totalDuration = CMTimeGetSeconds(duration);
            
            if (cuttTime < timeInterval)
            {
                //有时候网络卡会自动暂停，通过这个方式可以避免这种方式
                if (_playerLayer.moviePlayer.rate == 0 && _playerButton.isSelected == YES)
                {
                    [_playerLayer.moviePlayer play];
                }
            }
            else
            {
    
                
            }
        }

![复制代码][copycode.gif]

以上这些我认为就是主要的代码了。哦   还有个进入全屏播放的方式,大部分的项目都用到了UINavigationController，所以我用的横屏播放方式是模态跳转的方式

在需要横屏的controller添加以下代码

![复制代码][copycode.gif]

1 - (BOOL)shouldAutorotate
     2 {
     3     return NO;
     4 }
     5 
     6 -(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
     7 {
     8     return UIInterfaceOrientationLandscapeRight;
     9 }
    10 
    11 -(NSUInteger)supportedInterfaceOrientations
    12 {
    13     return UIInterfaceOrientationMaskLandscapeRight;
    14 }

![复制代码][copycode.gif]

这便可以跳转进入的时候横屏了

[avplayer]: http://www.cnblogs.com/lsios/p/4811858.html
[copycode.gif]: /images/20210813/bd87d31267624ceca2e6fa79539b227a.png