title: ios addSubview not scrolling in uiscrollview
body: <p>Im working in swift 2.0 in Xcode, Im facing an issue, I want to replace/add a subview in a <code>UIView</code> in storyboard.</p>
  
  <p>Here's my code:</p>
  
  <pre><code>    self.addChildViewController(vc)
      vc.view.frame = childView.frame
      self.container.addSubview(vc.view)
      vc.didMoveToParentViewController(self)
  </code></pre>
  
  <p>however I successfully adding the <code>subview</code> and I have <code>UIScrollView</code> in in which my <code>childView</code> <code>UIView</code> is palced .. but after placing the <code>subview</code>, Im unable to scroll the added view with <code>UIScrollview</code> but other content is scrolling fine.</p>
  
  <p>How can I replace/add subview in my <code>childView</code> in order to work with <code>UIScrollview</code></p>