How To Detect "Touch Down" in superview of UIScrollView?

Question

I have a UIView that contains a UIScrollView and I want to be able to capture the "Touch Down" event in the UIView any time the user taps on the UIScrollView.

I've tried including all the touchesBegan/Ended/Cancelled handlers in my UIViewController but none of them get fired when tapping inside the UIScrollView contained in the main UIView.

What is the best way to accomplish this?

Answer 1

In the UIView, implement touchesBegan:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // assign a UITouch object to the current touch
    UITouch *touch = [[event allTouches] anyObject];

    // if the view in which the touch is found is myScrollView
    // (assuming myScrollView is the UIScrollView and is a subview of the UIView)
    if ([touch view] == myScrollView) {
        // do stuff here
    }
}

A side note: make sure userInteractionEnabled is set to YES in the UIView.