title: bringSubViewToFront , sendViewToBack , Interface Builder , help !
body: <p>If I have the views added in Interface Builder and not as addSubView in program
  Can Use bringSubViewToFront , sendViewToBack? 
  do I need to define loadView in order to use them
  Because I am trying to use it in ViewDidLoad but it returns undefined method.</p>
  
  <p>I have some views in IB I want to send it back? bring other View in front using some boolean variables ? IS that possible in IB or I have to use bringSubViewToFront , sendViewToBack methods? How to use these methods in my case?
  many thanks</p>