title: Handle Event on pressing on tabbar item if its activated
body: <p>Hello
  Usually if you are in a UINavigation Hirarchy with a Tabbar-Navigationbar Combination and you press on a Tabbar Item you will get back to the rootviewControler.</p>
  
  <p>I need to get this event -> pressing on a tabbar item if its activated. Is this somehow possible to catch that event?</p>
  
  <p>best regards</p>