Double-tap or two single-taps?

Question

What is the time limit for two taps to be considered a double-tap, on the iPhone OS?

// Edit: Why is this important?

In order to handle single-tap and double-tap

Answer 1

You can detect any number of tap by the tap gesture. No need of playing with NSTouches either. For all the user seeking for the solution here it is.

These simple lines of code does the duty of single and double tap functionality.

  UITapGestureRecognizer *doubleTapRecg = [[UITapGestureRecognizer alloc]
                                             initWithTarget:self 
                                             action:@selector(doubleTapped:)];
    doubleTapRecg.delegate = self;
    doubleTapRecg.numberOfTapsRequired = 2;
    doubleTapRecg.numberOfTouchesRequired = 1;
    [view addGestureRecognizer:doubleTapRecg];


    UITapGestureRecognizer *tapRecg = [[UITapGestureRecognizer alloc]
                                       initWithTarget:self 
                                       action:@selector(tapped:)];
    tapRecg.delegate = self;
    tapRecg.numberOfTapsRequired = 1;
    tapRecg.numberOfTouchesRequired = 1;
    [view addGestureRecognizer:tapRecg];
    [tapRecg requireGestureRecognizerToFail:doubleTapRecg];


    [doubleTapRecg release];
    [tapRecg release];