title: popToViewController life cycle
body: <p>I'm working on iOS app and sometimes I need to jump on the second view of my application, but exactly on the state of the view I've left it. I've found out that popToViewController is suitable for this operation. My question is : What  happens with other views? Are they killed or are they still alive in the background? For navigation between views I'm using navigationController.
  Thank you.</p>