我正在实现 AVPlayer（不是 AVAudioPlayer）并尝试从 URL 播放音频。它工作正常。但正如我们所知，有时我们可能会有无效的 URL（没有音频字节的 URL）。当我从任何 URL 播放音频时，AVPlayer 状态总是显示 AVPlayerStatusReadyToPlay这是错误的。例如：在 URL 部分，如果给出无效的 URL，例如：http ://soundx.mp3slash.net/indian/jhankar_beats/1%28mp3pk.com%29.mp3 （即使在您的浏览器中也不起作用） ，即使您给出https://stackoverflow.com/questions/ask 或任何站点 URL（没有音频字节），AVPlayer 始终显示 AVPlayerStatusReadyToPlay。我认为在这种情况下，它的状态必须是 AVPlayerItemStatusUnknown 或 AVPlayerStatusFailed请帮助，如何知道 URL 无效（AVPlayerItemStatusUnknown 或 AVPlayerStatusFailed）表明我可以向用户显示消息。提前致谢
-(void)playButtonClicked
{
NSURL *url = [NSURL URLWithString:AUDIO_URL];
[self.audioSliderBar setMinimumValue:AUDIO_SLIDER_BAR_0];
playerItem = [AVPlayerItem playerItemWithURL:url];
player = [AVPlayer playerWithPlayerItem:playerItem];
player.volume=5.0;
[player addObserver:self forKeyPath:STATUS options:0 context:nil];
[playerItem addObserver:self forKeyPath:PLAY_BACK_BUFFER_EMPTY options:NSKeyValueObservingOptionNew context:nil];
[playerItem addObserver:self forKeyPath:PLAY_BACK_LIKELY_TO_KEEP_UP options:NSKeyValueObservingOptionNew context:nil];
addObserverFlag=YES;
}
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change: (NSDictionary *)change context:(void *)context
{
if (object == player && [keyPath isEqualToString:STATUS])
{
if (player.status == AVPlayerStatusFailed)
{
[ViewUtilities showAlert:AUDIO_PLAYER :AUDIO_PLAYER_FAILED_MESSAGE];
}
else if (player.status == AVPlayerStatusReadyToPlay)
{
else if (player.status == AVPlayerItemStatusUnknown)
{
[ViewUtilities showAlert:AUDIO_PLAYER :AUDIO_PLAYER_UNKNOWN];
}
if (!player)
{
return;
}
}
}`