Am I supposed to be able to detect multi-finger taps this way?

Question

This is the touchesBegan method for a view that has multiple touches enabled.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch* touch = [touches anyObject];
    if ([touches count] > 1)
        NSLog(@"multi touches: %d fingers", [touches count]);

    NSUInteger numTaps = [touch tapCount];

    if (numTaps == 1) {
        NSLog(@"single tap");
    } else {
        NSLog(@"multi tap: %d", numTaps);
    }
}

I never seem to log a multi-touch. Just single and double taps. Am I wrong to have assumed it was as easy as getting the count for touches?

Answer 1

I tried three different ways and only one can return two to five finger taps. The winning mechanism is NSSet *touch = [event allTouches];

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
        UITouch* touch = [touches anyObject];
    // the next line will not ever return a multiple tap
    if ([touches count] > 1)
        NSLog(@"multi-touches %d", [touches count]);
    // the next line will return up to 5 (verified) simultaneous taps (maybe more)
        NSSet *touch2 = [event allTouches];
    if ([touch2 count] > 1)
        NSLog(@"multi-touches2 %d", [touch2 count]);
    // the next line only returns 1 tap
        NSSet *touch3 = [event touchesForView:self];
    if ([touch3 count] > 1)
        NSLog(@"multi-touches2 %d", [touch3 count]);
}