title: UIRefreshControl Custom Height
body: <p>Help!!!
  I am using <code>UIRefreshControl</code> for my iOS tableview pull-to-refresh feature.
  However, my layout need to have a larger "loading area".
  How can I make the area larger?? 
  I have tried <code>self.tableView.contentInset = UIEdgeInsetsMake(500, 0, 0, 0)</code> but it does not work well when <code>refreshControl!.endRefreshing()</code> is called.</p>
  
  <p><a href="https://i.stack.imgur.com/IR5D1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IR5D1.png" alt="enter image description here"></a></p>