UIScrollView: paging horizontally, scrolling vertically?

Question

How can I force a UIScrollView in which paging and scrolling are on to only move vertically or horizontally at a given moment?

My understanding is that

Answer 1

If you are having a big scrollview... and you want to restrict the diagonal scrolling http://chandanshetty01.blogspot.in/2012/07/restricting-diagonal-scrolling-in.html