title: Forward vertical scrolls from UIScrollView to a sibling UITableView
body: <p>I have a view controller with this hierarchy:</p>
  
  <p>View Controller:</p>
  
  <ul>
  <li>UIScrollView (scrollable horizontally)</li>
  <li>UITableView (scrollable vertically)</li>
  </ul>
  
  <p><img src="https://i.stack.imgur.com/VxQKo.png" alt="enter image description here"></p>
  
  <p>I want to forward the vertical scrolls from my <code>UIScrollView</code> to the sibling <code>UITableView</code>, so that when the user scrolls up on the <code>UIScrollView</code>, the <code>UITableView</code> will scroll up instead. What would be the best way to do it?</p>
  
  <p>I have tried these:</p>
  
  <ul>
  <li>Detecting the vertical scroll in <code>scrollViewDidScroll</code>, it doesn't get called because the contentOffset of the scroll view does not change.</li>
  <li>Subclassing the <code>UIScrollView</code> and overriding <code>touchesMoved</code>, I can't forward the touches to the table view because I don't have a reference to it in this class.</li>
  </ul>