ios - iPhone上的系统声音无法播放

Question

我想播放系统声音，但听不到任何声音:

- (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。我究竟做错了什么？

Answer 1

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

试试这个 :

- (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);
}