title: how to navigate UItabbarviewcontroller
body: <p>I Have a viewcontroller and tabbarviewcontroller.
  I du have the connection between viewcontroller and tabbarviewcontroller.
  <strong>Example: If I click on a picture inside a button of viewcontroller then the tabbarviewcontroller got opened.
  but I need to back from tab1 or tab2 with a navigationcontroller.</strong>
  what is the easiest way and efficient way to do it in iOS?</p>
  
  <p>Thankss</p>