title: How to add extra line separators on UITableView
body: <p>How can I add again the extra line separators on a <code>UITableView</code>?</p>
  
  <p>For example, I removed the extra line separators like this:</p>
  
  <pre><code>tableView.tableFooterView = UIView()
  </code></pre>
  
  <p>to show an <code>UITableViewCell</code> saying the list is empty or an error has ocurred.</p>
  
  <p>But when I retrieve items to the <code>UITableView</code> I want to show the extra lines again.</p>
  
  <p>Is any way to do that?</p>