AVPlayer缓冲问题

1.首先对playerItem 进行监听

[playerItem addObserver:self forKeyPath:@"playbackBufferEmpty" options:NSKeyValueObservingOptionNew context:nil];

[playerItem addObserver:self forKeyPath:@"playbackLikelyToKeepUp" options:NSKeyValueObservingOptionNew context:nil];

2.在监听方法里

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object

change:(NSDictionary *)change context:(void *)context {

if (!player)

{

return;

}

else if (object == playerItem && [keyPath isEqualToString:@"playbackBufferEmpty"])

{

if (playerItem.playbackBufferEmpty) {

// 做一些缓冲的操作 例如展示label 或者 加载一个缓冲条 playBufferEmpty （用于标识是否处于缓冲状态）

playBufferEmpty = TRUE;

[indicator startAnimating];

[vidStreaminglabel setText:@"Buffering..."];

[vidStreaminglabel setHidden:NO];

}

}

else if (object == playerItem && [keyPath isEqualToString:@"playbackLikelyToKeepUp"])

{

if (playerItem.playbackLikelyToKeepUp)

{

//做一些结束缓冲的操作

playBufferEmpty = FALSE;

[indicator stopAnimating];

[vidStreaminglabel setHidden:YES];

}

}

}