title: Can't interact with parent UIViewController (with NIB) having Child UIViewController (with NIB)
body: <p>How can we interact with Parent UIViewController (having buttons) blocked by Child UIViewController. Apparently the touch events aren't going through the Child NIBs. (User Interaction Enabled)</p>
  
  <p>Note: I'm loading both default and custom NIBs, (using initWithNibName: method).</p>
  
  <p>Thanks.</p>