title: reloading table view works just by scrolling outside the visible area
body: <p>normally, the way to update a tableView is calling <code>self.tableView reloadData</code> (or setNeedsDisplay), but my (visible) tableView doesn't reload by calling this method.</p>
  
  <p>My context is, that I've got a Navigation-Bar and a TableView and by clicking a button on the Navigationbar, the method "aktualisieren" starts. This method also works (i use a UIAlertView to check it) But the Context just updates when i scroll the TableView (after reloading) in the unvisible area (top oder bottom). Then, just the cells which were in the outside area are reloaded. Why? Can anyone helps me?</p>
  
  <p>Thank you very much,</p>
  
  <p>Jonathan</p>