title: Popping all View Controllers on Tab Bar App
body: <p>I have a tab bar app with navigation controllers on 4 out of the 5 tabs on the app.  I have a 'reset app' function within my app which clears all data etc... and I would also like that to pop all of the view controllers back to their top view.  I know how to pop to root using popToRootViewControllerAnimated for a single nav controller but is it possible to pop all of the view controllers on each tab?</p>