title: Result of call to 'becomeFirstResponder()' is unused UITextField inside UITableView
body: <p>I'm trying to put cursor in first UITextField inside UITableView and let keyboard to be displayed as wrote like that.</p>
  
  <pre><code>if (indexPath.row == 0) {
      cell.inputTextField.becomeFirstResponder()
  }
  </code></pre>
  
  <p>But warning showing like that.</p>
  
  <blockquote>
    <p>Result of call to 'becomeFirstResponder()' is unused</p>
  </blockquote>
  
  <p>How to put cursor in first UITextField and let KeyBoard to be displayed?</p>