I have 10 views with UINavigationController in hiereachy

now when i want to go back from 10 to 9 ,and so on by back button

which method should i use? 1>popviewCOntroller 2>popToViewController

I have set fixed value for all views.at application launch i get that value for that value i intialize rootviewController with use of UINavigationController and my rootviewcontroller is nothing but first view and after that on next line i'm pushing a particular view.

plz help me out