iOS how to determine if the screen has been tapped

Question

I am using iOS 5.x SDK and I want to determine if the screen has been tapped

For now just putting up an NSLog is fine but I don't know where to start

Answer 1

Generally with gesture recognizers , eg,

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapOnView:)];
[self.view addGestureRecognizer:tap];

You then have a method like:

- (void)tapOnView:(UITapGestureRecognizer *)sender
{
    CGPoint location = [sender locationInView:self.view];
    NSLog(@"Tap at %1.0f, %1.0f", location.x, location.y);
}

Answer 2

You might want to start with implementing touchesBegan:withEvent: , touchesMoved:withEvent: , touchesEnded:withEvent: , touchesCancelled:withEvent: .

You can read more about it here: UIResponder Class Reference