Question

I have a MainView with MainViewController. Now I want to add a specific area where I want to register touches (painting in a specific area). How could I do this?
I thought about adding a sub-view with its own sub-viewcontroller, but this guy tells this is not a good approach.

Answer 1

Add a custom view as a property, called touchArea

-(void) touchesBegan/Moved/Ended (NSSet *)touches withEvent:(UIEvent *)event {

CGPoint location = [[touches anyObject] locationInView:self.view];

if (CGRectContainsPoint(touchArea.frame, location))
//code
}

}