title: Detect UITableview header reaches at bottom
body: <p>In <code>UITableview</code> how to detect if the last header reached at the bottom while scrolling. Cells will not be display initially. It will show only if the user touches the header.</p>
  
  <p>I have used this delegate to get if the cell reaches the bottom,</p>
  
  <pre><code>-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
  </code></pre>
  
  <p>but I can't get it for headers. Is there any way to detect?</p>
  
  <p><a href="https://i.stack.imgur.com/YuuRa.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YuuRa.jpg" alt="enter image description here"></a></p>
  
  <p>All answers are appreciated!!</p>