title: Changing UITableView's section header/footer title without reloading the whole table view
body: <p>Is there any way to reload the section header/footer of a table view without calling
   <code>[tableView reloadData];</code>?</p>
  
  <p>In fact, I want to show the number of cells in a table view's section in its section footer. The table view is editable and I delete or insert rows using</p>
  
  <pre><code>– insertRowsAtIndexPaths:withRowAnimation:
  – deleteRowsAtIndexPaths:withRowAnimation:
  </code></pre>
  
  <p>It seems that these methods do not update the section footer. Strangely, when I call these methods the table view data-source method</p>
  
  <pre><code>- (NSString *)tableView:(UITableView *)table titleForFooterInSection:(NSInteger)section 
  </code></pre>
  
  <p>is called (twice!) but it does not update the table view with the new values!!</p>
  
  <p>Anyone has any idea how to fix this problem?</p>