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- (void)viewDidLoad {

SystemSoundID ReelStopSound;
NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"spin" ofType:@"mp3" ];
CFURLRef soundURL = (CFURLRef)[NSURL fileURLWithPath:soundPath];
AudioServicesCreateSystemSoundID(soundURL, &ReelStopSound);
AudioServicesPlaySystemSound(ReelStopSound);    
[super viewDidLoad];
}

当我在模拟器中运行这个应用程序时,它会播放 spin.mp3,但在我的 iPad 中却不是!

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