title: iOS how to scroll small child scrollview in large parent scrollview?
body: <p>I have added small size UIScrollview in the large size UIScrollview in storyboard.
  When I try horizontal scrolling in small child scrollview, the large parent scrollview is scrolled.<br>
  What I want is when I scroll in child, child will be scrolled, and when I scroll in parent area, parent will be scrolled.<br>
  How can I achieve this?</p>