title: Scrollview content shows but not scrolling
body: <p>I have a <code>ViewController</code> with a <code>ScrollView</code> containing bunch of content from <code>IB</code> but the scrollview isn't working.  </p>
  
  <pre><code>- (void)viewDidLoad
  {
      [super viewDidLoad];
  /*
   *  configure a bunch of label, text ,images and views from IB
  */
  
      UIScrollView* scrollView = (UIScrollView*)self.view;
      scrollView.scrollEnabled = YES;
      scrollView.contentSize = CGSizeMake(320, 2000);
  }
  </code></pre>
  
  <p>I can see my content up until the bottom but can't scroll.  If it means anything, this <code>ViewController</code> in one of the tabs in a <code>TabBar</code></p>