title: iPhone one title for all view controllers
body: <p>I have an app with tab bar controller (with 4 views controller) and it contains a navigation controller. All of this was create programmatically.
  My question:
  Is there a way how to set one navigation bar title for all view controllers ? For example: When i switch tabs, title is the same. Ideal solution for me is set title in app delegate file. Thanks a lot</p>