title: UITableViewHeader keep(a part) always visible
body: <p>I have a TableView with on Image inside the header. When the user scrolls up, the header scrolls out of sight. But I would like to keep the last 50 Pixels of the header always visible...</p>
  
  <p>Is there a simple way to handle this?</p>
  
  <p>Thanks,
  Urkman</p>