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

I am not sure if this is the correct way of doing things but this code is working well for me.

in my .h file:

 @interface MyViewController : UIViewController { 

 int tapCount; 

 } 
 @property (nonatomic, assign)int tapCount; 
 @end

in my .m file:

@synthesize tapCount;

- (void)tapGesture:(UIGestureRecognizer*)gesture {
    tapCount = tapCount + 1;
    [self performSelector:@selector(correctTapCount) withObject:nil afterDelay:0.3];


}
-(void)correctTapCount {
    if (tapCount == 1) {
        NSLog(@"Single Tap");
    }
    if (tapCount == 2) {
        NSLog(@"Double Tap");
    }

    //reset TapCount
    tapCount = 0;
}

And this is where I add my tap listener (it is on a UIImageView )

//add tap listener
carImage.userInteractionEnabled = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];
[carImage addGestureRecognizer:tap];
[tap release];

Good Luck and Happy Coding!