检测与AVPlayerItem相关的短暂中断

Question

如果我启动此流然后关闭wifi，则“playbackBufferEmpty”会被触发，我可以尝试重新启动流来响应。但是，如果我关闭wifi并立即重新开启，则流停止播放，但没有任何观察者被触发。

- (void)restartStream
{
    [self.activityIndicator startAnimating];
    NSLog(@"Removing Observers");
    [self.radioStream removeObserver:self forKeyPath:@"status"];
    [self.radioStream removeObserver:self forKeyPath:@"timedMetadata"];
    [self.radioStream removeObserver:self forKeyPath:@"playbackBufferEmpty"];
    [self.radioStream removeObserver:self forKeyPath:@"playbackLikelyToKeepUp"];
    NSLog(@"Creating New AVPlayerItem");
    self.radioStream = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"http://mystream.com"]];
    [self.radioStream addObserver:self forKeyPath:@"status" options:0 context:nil];
    [self.radioStream addObserver:self forKeyPath:@"timedMetadata" options:NSKeyValueObservingOptionNew context:nil];
    [self.radioStream addObserver:self forKeyPath:@"playbackBufferEmpty" options:NSKeyValueObservingOptionNew context:nil];
    [self.radioStream addObserver:self forKeyPath:@"playbackLikelyToKeepUp" options:NSKeyValueObservingOptionNew context:nil];
    NSLog(@"Playing radioPlayer with new AVPlayerItem");
    self.radioPlayer = [AVPlayer playerWithPlayerItem:self.radioStream];
}

Answer 1

似乎是模拟器的问题。在设备上触发“status”或“playbackBufferEmpty”。