title: how to pass data between these two view controllers in swift
body: <p>in this case i have tabbar controller and navigation controller between the 
  two VC,which means firstly i want to pass data between the first VC and the tabbar controller, and secondly i want to pass the same data from the tab bar controller to navigation controller , and finnally to the last VC,i searched for example in the net but i didn't find anything useful.</p>
  
  <p><br>
  <img src="https://i.stack.imgur.com/tAtvh.png" alt="pass data"></p>
  
  <p>please can u help me pass data between these two viewcontrollers ,any example will be great, thaank's.</p>