title: I find a tableview cannot scroll in iOS 11
body: <p>I found my <code>UITableView</code> can't scroll in iOS 11, so I did some tests in the "cell for row" delegate method:</p>
  
  <ul>
  <li>when I set the <code>cell.userInteractionEnabled</code> to <code>NO</code>, scrolling works</li>
  <li>When I set the <code>cell.contentView.userInteractionEnabled</code> to <code>NO</code>, it doesn't</li>
  </ul>
  
  <p>My custom view is in <code>cell.contentView</code>, so I don't know how to fix it...</p>