How can a superview interecept a touch sequence before any of its subviews?

Question

I have a view hierarchy that is layed out as follows:

parentView

 scrollView

    contentViewA

    containerView

         contentViewB

         co         


        

Answer 1

Another way of doing this is to add another subview to your ui so it looks like so :

parentView
  scrollView
    contentViewA
      containerView
        contentViewB
        contentViewC
  touchGrabber

and, in touchGrabber, detect all the touches that you want (by subclassing UIView)

This is more complicated than Phil Nash's solution but has the advantage that you can add/remove other views from your parentView without having to deal with their userInteractionEnabled value - this is useful if you have a third party library adding views for example.

However, if you definately only going to have the scrollView, Phil Nash's answer is the way forward!

Thanks,

Sam

Answer 2

To stop the scroll view from intercepting the touch events, set the userInteractionEnabled property like so:

scrollView.userInteractionEnabled = NO;