title: Paging UIScrollView in increments smaller than frame size
body: <p>I have a scroll view that is the width of the screen but only about 70 pixels high. It contains many 50 x 50 icons (with space around them) that I want the user to be able to choose from. But I always want the scroll view to behave in a paged manner, always stopping with an icon in the exact center. </p>
  
  <p>If the icons were the width of the screen this wouldn't be a problem because the UIScrollView's paging would take care of it. But because my little icons are much less than the content size, it doesn't work.</p>
  
  <p>I've seen this behavior before in an app call AllRecipes. I just don't know how to do it.</p>
  
  <p>How do I get paging on a per-icon sized basis to work?</p>