最后一次在AVQueuePlayer中重播项目

我需要在我的AVQueuePlayer创建类似无限循环的AVQueuePlayer 。 特别是，我想在最后一个组件完成播放后重播AVPlayerItem的整个NSArray 。

我必须承认，我实际上并不知道如何实现这一点，并希望你能给我一些线索。

---

这是从头开始。 这些组件是：

创建一个是AVPlayerItems的NSArray的队列。

当每个项目被添加到队列中时，设置一个NSNotificationCenter观察者以在视频到达结束时唤醒。

在观察者的选择器中，告诉AVPlayerItem你想循环回去开始，然后告诉玩家玩。

（注意：AVPlayerDemoPlaybackView来自Apple的“AVPlayerDemo”示例，简单地说就是具有setter的UIView的子类）

BOOL videoShouldLoop = YES;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSMutableArray *videoQueue = [[NSMutableArray alloc] init];
AVQueuePlayer *mPlayer;
AVPlayerDemoPlaybackView *mPlaybackView;

// You'll need to get an array of the files you want to queue as NSARrray *fileList:
for (NSString *videoPath in fileList) {
    // Add all files to the queue as AVPlayerItems
    if ([fileManager fileExistsAtPath: videoPath]) {
        NSURL *videoURL = [NSURL fileURLWithPath: videoPath];
        AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL: videoURL];
        // Setup the observer
        [[NSNotificationCenter defaultCenter] addObserver: self
                                                 selector: @selector(playerItemDidReachEnd:)
                                                     name: AVPlayerItemDidPlayToEndTimeNotification
                                                   object: playerItem];
        // Add the playerItem to the queue
        [videoQueue addObject: playerItem];
    }
}
// Add the queue array to the AVQueuePlayer
mPlayer = [AVQueuePlayer queuePlayerWithItems: videoQueue];
// Add the player to the view
[mPlaybackView setPlayer: mPlayer];
// If you should only have one video, this allows it to stop at the end instead of blanking the display
if ([[mPlayer items] count] == 1) {
    mPlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone;
}
// Start playing
[mPlayer play];


- (void) playerItemDidReachEnd: (NSNotification *)notification
{
    // Loop the video
    if (videoShouldLoop) {
        // Get the current item
        AVPlayerItem *playerItem = [mPlayer currentItem];
        // Set it back to the beginning
        [playerItem seekToTime: kCMTimeZero];
        // Tell the player to do nothing when it reaches the end of the video
        //  -- It will come back to this method when it's done
        mPlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone;
        // Play it again, Sam
        [mPlayer play];
    } else {
        mPlayer.actionAtItemEnd = AVPlayerActionAtItemEndAdvance;
    }
}

而已！ 让我知道一些事情需要进一步的解释。

---

在AVQueuePlayer中循环视频序列的最佳方式。

观察AVQueuePlayer中的每个播放项目。

queuePlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone;
for(AVPlayerItem *item in items) {
    [[NSNotificationCenter defaultCenter] addObserver:self 
            selector:@selector(nextVideo:) 
            name:AVPlayerItemDidPlayToEndTimeNotification 
            object:item ];
}

在每个下一个视频上再次插入currentItem以将其排队以供播放。 确保为每个项目寻求零。 在advanceToNextItem之后，AVQueuePlayer将从队列中移除currentItem。

-(void) nextVideo:(NSNotification*)notif {
    AVPlayerItem *currItem = notif.userInfo[@"object"];
    [currItem seekToTime:kCMTimeZero];
    [queuePlayer advanceToNextItem];
    [queuePlayer insertItem:currItem afterItem:nil];
}

---

我想出了一个解决方案来循环播放视频队列中的所有视频，而不仅仅是一个。 首先我初始化了我的AVQueuePlayer ：

- (void)viewDidLoad
{
    NSMutableArray *vidItems = [[NSMutableArray alloc] init];
    for (int i = 0; i < 5; i++)
    {
        // create file name and make path
        NSString *fileName = [NSString stringWithFormat:@"intro%i", i];
        NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:@"mov"];
        NSURL *movieUrl = [NSURL fileURLWithPath:path];
        // load url as player item
        AVPlayerItem *item = [AVPlayerItem playerItemWithURL:movieUrl];
        // observe when this item ends
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(playerItemDidReachEnd:)
                                                     name:AVPlayerItemDidPlayToEndTimeNotification
                                                   object:item];
        // add to array
        [vidItems addObject:item];


    }
    // initialize avqueueplayer
    _moviePlayer = [AVQueuePlayer queuePlayerWithItems:vidItems];
    _moviePlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone;

    // create layer for viewing
    AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:_moviePlayer];

    layer.frame = self.view.bounds;
    layer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    // add layer to uiview container
    [_movieViewContainer.layer addSublayer:layer];
}

通知发布时

- (void)playerItemDidReachEnd:(NSNotification *)notification {
    AVPlayerItem *p = [notification object];

    // keep playing the queue
    [_moviePlayer advanceToNextItem];
    // if this is the last item in the queue, add the videos back in
    if (_moviePlayer.items.count == 1)
    {
        // it'd be more efficient to make this a method being we're using it a second time
        for (int i = 0; i < 5; i++)
        {
            NSString *fileName = [NSString stringWithFormat:@"intro%i", i];
            NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:@"mov"];
            NSURL *movieUrl = [NSURL fileURLWithPath:path];

            AVPlayerItem *item = [AVPlayerItem playerItemWithURL:movieUrl];

            [[NSNotificationCenter defaultCenter] addObserver:self
                                                     selector:@selector(playerItemDidReachEnd:)
                                                         name:AVPlayerItemDidPlayToEndTimeNotification
                                                       object:item];

             // the difference from last time, we're adding the new item after the last item in our player to maintain the order
            [_moviePlayer insertItem:item afterItem:[[_moviePlayer items] lastObject]];
        }
    }
}

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