title: Disable/enable scroll view in a different class
body: <p>I got a class ViewController which inhertis from UIViewController:</p>
  
  <pre><code>@interface PagerViewController : UIViewController &lt;UIScrollViewDelegate&gt;
  </code></pre>
  
  <p>and here I can turn on and off the scroll option like this:</p>
  
  <pre><code>[self setScrollEnabled:NO]; 
  </code></pre>
  
  <p>I addrf some other ViewController class as a child but the problem is that when I try to enable or disable the scroll there, it doesn't recognize the "setScrollEnabled". In this class I got a button and I want to disable "setScrollEnabled" when the button is pushed. How can I do this?</p>