title: Change the view of a UIViewController dynamically in iOS 7
body: <p>I have 2 Custom View classes(<code>CustomView_A, CustomView_B</code>) derived from <code>UIView</code>. I have <code>UIViewController</code> that should be able to switch between views at run-time..</p>
  
  <p>What so far, I have done is.. in the Storyboard, I am using <code>CustomView_A</code> class as the View class.</p>
  
  <pre><code>@interface MyViewController: UIViewController
  
  @property (nonatomic, weak) CustomView_A *customView_A;
  </code></pre>
  
  <p>Now I have the second <code>CustomView_B</code> class and I want to change view of <code>MyViewController</code>'s view to <code>CustomView_B</code> at run-time. </p>
  
  <p>How can I do that? Thanks in advance..</p>