title: Change class of UICollectionView to PSTCollectionView in xib
body: <p>My application is supporting iOS 5.1+. And I want to use <code>UICollectionView</code> in my application.</p>
  
  <p>But <code>UICollectionView</code> is not available prior iOS 6.0 versions. So I used famous third party library <a href="https://github.com/steipete/PSTCollectionView" rel="nofollow">PSTCollectionView</a>. It has solve my all class related errors.</p>
  
  <p>Now problem is in my <code>XIB</code> I have used <code>UICollectionView</code> control. When I build application I get following error for <code>XIB</code> only:</p>
  
  <pre><code>error: Class Unavailable: `UICollectionView` on iOS versions prior to 6.0
  </code></pre>
  
  <p>I tried to change the parent class of <code>UICollectionView</code> to <code>PSTCollectionView</code> but it is not showing there any such class in listing.</p>
  
  <p>How can I solve this <code>XIB</code> related problem.</p>