iOS How to know every time i touch tabitem from tabBar which one i've chose?

[PizzaTray]

I've made a tabBarApp with NavController, and i want to know every time that the user will choose one of the tabs - which tab was chosen.
how?

 

[dejo]

I'm gonna channel robbieduncan here: "Read the documentation for UITabBarControllerDelegate. There's a pretty obvious instance method that does what you need."