与AVAudioPlayer iPhone上的奇怪行为 [英] Strange behaviour with AVAudioPlayer on the iPhone

问题描述

我试图用打一个AVAudioPlayer的声音。应该是简单的，但我看到了一些奇怪的结果。

I'm attempting to play a sound using AVAudioPlayer. Should be simple, but I'm seeing some odd results.

code：

NSString *path = [[NSBundle mainBundle] pathForResource:@"pop" ofType:@"wav"];
NSURL *url = [NSURL fileURLWithPath:path];
AVAudioPlayer *sound = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
[sound play];
[sound release];

我所看到的是，正常使用应用程序时声音不玩了。

What I'm seeing is that the sound doesn't play when using the app normally.

它发挥的仅如果我使用调试器通过code步骤，执行其它的方式，当它不玩...

It plays only if I step through the code using the debugger, it doesn't play when executing any other way...

我没有创造我的应用程序中的任何新主题或运行循环，所以这个应该都在主线程上运行，至少 [NSThread isMainThread] 返回true

I'm not creating any new threads or run loops within my app, so this should all be running on the main thread, at least [NSThread isMainThread] returns true.

任何人有什么想法，什么是怎么回事？

Anyone got any ideas as to what is going on here?

推荐答案

AVAudioPlayer的播放方法是异步的，所以你开始播放声音，然后立即释放它！这就是为什么当你通过它在调试步骤作品 - 你给它时间杀死它之前玩。你想要做的是落实AVAudioPlayerDelegate的 - （无效）audioPlayerDidFinishPlaying：（AVAudioPlayer *）成功的球员：（BOOL）标志方法并释放音频播放器出现后，声音做游戏。

AVAudioPlayer's play method is asynchronous, so you're starting to play the sound and then immediately releasing it! That's why it works when you step through it in the debugger -- you're giving it time to play before killing it. What you want to do is implement AVAudioPlayerDelegate's - (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag method and release the audio player there, after the sound is done playing.

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