title: UIScrollView - scrollRectToVisible - showing a button at the center of the screen?
body: <p>I have a uiscrollview with tons of buttons in it.
  What I need to do is show one of these buttons at the center of the screen.</p>
  
  <p>When I use scrollRectToVisible (passing the button-frame), the scrollview indeed shows the button - but sometimes at the top-left corner, sometimes at the bottom right corner - apparently depending on when the button hits the visible area of the scrollview.</p>
  
  <p>But - as mentionend - I need the button to appear in the center of the screen.</p>
  
  <p>Any hints on how to achieve that?</p>
  
  <p>Thanks for any help!</p>