title: Passing data to a previous screen
body: <p>Firstly, if you pop a screen off, does it mean all initializations have been destroyed?</p>
  <p>I initialized a few variables to a previous screen, was hoping to see the changes when I go back to the screen but I don't see the changes</p>
  <p>Is it possible to pass a few data to a previous screen without moving to that screen? if yes, how?</p>