title: Getting row of UITableView cell on button press swift 3
body: <p>I have this code working on swift 2, it's serve to getting row of UITableView cell on button press:</p>
  
  <pre><code>@IBAction func commentsButtonAction(sender: AnyObject) {
      let btnPos: CGPoint = sender.convert(point:CGPoint.zero, toView: self.tableView)
      let indexPath: NSIndexPath = self.tableView.indexPathForRow(at: btnPos)! as NSIndexPath
      passaValor = indexPath.row
      performSegue(withIdentifier: "searchToComments", sender: self)
  }
  </code></pre>
  
  <p>In swift 3 I receive this error</p>
  
  <blockquote>
    <p>Cannot invoke 'convert' with an argument list of type '(point:
    CGPoint, toView: UITableView!)'</p>
  </blockquote>
  
  <p>Any ideas?
  Thanks.</p>