iPhone上的系统声音无法播放 [英] system sound on iphone not playing

问题描述

我想播放系统声音，但什么也没听到:

I want to play a system sound but I don't hear anything:

- (void) play_system_sound
{
    NSLog(@"Play system sound");

    SystemSoundID soundID;
    NSString *path = [[NSBundle bundleWithIdentifier:@"com.apple.UIKit"] pathForResource:@"Tock" ofType:@"aiff"];
    NSLog(@"path = %@", path );
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:path], &soundID);
    AudioServicesPlaySystemSound(soundID);
    AudioServicesDisposeSystemSoundID(soundID);
    NSLog(@"Play system sound DONE");
}

我什么也没听到.我在做什么错了?

I don't hear anything. What am I doing wrong?

推荐答案

在AudioServicesPlaySystemSound(soundID)之后，请勿立即调用AudioServicesDisposeSystemSoundID(soundID).

After AudioServicesPlaySystemSound(soundID) ,don't call AudioServicesDisposeSystemSoundID(soundID) immediately.

尝试一下:

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSString *path = [[NSBundle bundleWithIdentifier:@"com.apple.UIKit"] pathForResource:@"Tock" ofType:@"aiff"];
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:path], &soundID);
}

-(void)dealloc
{ 
    AudioServicesDisposeSystemSoundID(soundID);
}

- (void)play_system_sound
{
    AudioServicesPlaySystemSound(soundID);
}

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