title: iOS - UIPickerView disable component
body: <p>I have a dynamic <code>UIPickerView</code> that work like that :</p>
  
  <ul>
  <li>Begin with only 1 component</li>
  <li>When select a row, add a new component</li>
  </ul>
  
  <p>For precision, by component I mean column.</p>
  
  <p>I want only my last added component to be actived. Others one should be completely disabled and should not even be able to scroll or be able to select rows.</p>
  
  <p>I already know how to add a component dynamically but I have no idea to disable one. </p>
  
  <p>Is there any way to do that ?</p>