AVAudioPlayer 在 iPod touch 2G 和 3G 中播放音乐
我正在尝试使用 AVAudioPlayer 在 iPhone 和 iPod touch 上播放音频文件。该代码在 iPhone 和 iPod touch 4G 上运行良好，我可以听到音乐。但是当我在 iPod touch 2G、iPod touch 3G 上测试时，我听不到任何声音。
下面是我用来播放音频文件的代码：
NSString *zeroAudioPath = [[NSBundle mainBundle] pathForResource:@"TimerBell"
ofType:@"aif"];
NSURL *file = [[NSURL alloc] initFileURLWithPath:zeroAudioPath];
AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:file
error:nil];
[file release];
self.zeroAudioPlayer = audioPlayer;
zeroAudioPlayer.delegate = self;
[audioPlayer release];
[zeroAudioPlayer prepareToPlay];
[zeroAudioPlayer play];
I'm trying to play an audio file on iPhone and iPod touch with AVAudioPlayer. The code works fine in iPhone and iPod touch 4G, I can hear the music. But when I test it on iPod touch 2G, iPod touch 3G, I can't hear anything.
Below is the code I use to play audio file:
NSString *zeroAudioPath = [[NSBundle mainBundle] pathForResource:@"TimerBell"
ofType:@"aif"];
NSURL *file = [[NSURL alloc] initFileURLWithPath:zeroAudioPath];
AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:file
error:nil];
[file release];
self.zeroAudioPlayer = audioPlayer;
zeroAudioPlayer.delegate = self;
[audioPlayer release];
[zeroAudioPlayer prepareToPlay];
[zeroAudioPlayer play];
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我发现从
kAudioSessionCategory_PlayAndRecord更改为kAudioSessionCategory_AmbientSound可以纠正此问题。我怀疑这与 iPod touch 上与录音相关的硬件差异有关。I found that changing from
kAudioSessionCategory_PlayAndRecordtokAudioSessionCategory_AmbientSoundcorrected this issue. I suspect this has something to do with a hardware difference on the iPod touch related to recording.在玩之前你应该像这样使用audiosession：
You should use audiosession like this before you play: