title: How can I add a view from subviews on top of its superview?
body: <p>I have a mainViewController and inside its nib file I added an info button, in which action is to flip between two subviews, subview A and subview B. </p>
  
  <p>From mainViewController, under viewDidLoad, I'm inserting subview A. Here I notice that the info button is in front of the subview A, which is fine. </p>
  
  <p>The problem comes that when pressing any buttons that are located within subview A's nib file, in which they add new subviews, the info button remains on front.  </p>
  
  <p>So, how can I add these later subviews on front of all parent view stacks, so the info button does not appear? or how can I hide the info button?</p>