<presumtions>
you mean a tab bar as the bar at the bottom like on the photos app
the button 'button' on first should move the user to third
</presumtions>
you need to embed the first VC in tab bar controller, which you an then branch off the number of VC's you want. Its bad practise to have a button on screen that pushes you to a VC when you can press a button in the tab bar as well