iOS cancel touch events in certain regions

Question

Is there a way to cancel touch events in certain regions of a view? I have a custom UIView and I only want to process touch events only if they are say 100 pixels from the edges of the screen.

Answer 1

As Justin said, add a custom UIView in interface builder (or programmatically) and add it to the view. let's call that view touchArea. Then in your Viewcontroller.m file, implement the

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

methods (depends on what you're trying to do), and in these do:

    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInView:self.view];
if (CGRectContainsPoint(touchArea.frame, location)) {

//code to execute

}

actually, I think even a CGRect as an instance variable that is placed on the view can work, but the above is how I achieved it.