objective-c - 如何为按钮添加短促的声音？

Question

我希望我的按钮发出短暂的叮当声，并在每次单击后在两个位置之一之间随机切换。当我尝试下面的代码时，程序停止工作。在我插入 systemSound ID 代码之前，代码运行良好。

- (IBAction)CountRedClicks:(id)sender{
SystemSoundID soundID;
NSString *soundFile = [[NSBundle mainBundle] pathForResource:@"ding" ofType:@"mp3"];
AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:soundFile], &soundID);
AudioServicesPlaySystemSound(soundID);
RedCounter = RedCounter + 1;
RandNumber = 1 + arc4random() % 2;
if (RandNumber == 1) {
    CGRect frame = RedButton.frame;
    frame.origin.x = 128;
    frame.origin.y = 458;
    RedButton.frame = frame;
}
if (RandNumber == 1) {
    CGRect frame = GreenButton.frame;
    frame.origin.x = 422;
    frame.origin.y = 458;
    GreenButton.frame = frame;
}
if (RandNumber == 2) {
    CGRect frame = RedButton.frame;
    frame.origin.x = 422;
    frame.origin.y = 458;
    RedButton.frame = frame;
}
if (RandNumber == 2) {
    CGRect frame = GreenButton.frame;
    frame.origin.x = 128;
    frame.origin.y = 458;
    GreenButton.frame = frame;
}
if (RedCounter == 10) {
    RedCounter = 0;
    PointsCounter = PointsCounter + 1;
    PointsLabel.text = [NSString stringWithFormat:@"%i", PointsCounter];
    RedButton.hidden = true;
    GreenButton.hidden = true;
    PointsLabel.hidden = false;
    ResetButton.hidden = false;

    if (PointsCounter == 3){
        [PointsLabel setText:@"GREAT JOB!"];
        ResetButton.hidden = true;

    }

}

}