iPhone - How to play a sound on button touch?

I'm trying to make a button play a sound upon touching the button. I can get the sound to play with the Touch Up Inside option but that's not what I'm looking for because the sound only plays after the button is released.

I've tried to use touchesBegan to play the sound upon touching the button but it doesn't seem to work. Any ideas why?

Thanks

My code:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
[super touchesBegan:touches withEvent:event];
    if([touch view] == doneButton) {


NSString *path = [[NSBundle mainBundle] pathForResource:@"click" ofType:@"caf"];
AVAudioPlayer* clickAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
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clickAudio.delegate=self;
[clickAudio play];

    }

}

Use a UIButton. Call -play on touch down and call -stop on touch up.