So, i'm making a simple app that contains 9 views, each one with 3 question, i'm sending the answer from one view to another until the last view, but i would like to set all the answer inside a Global var. How can i achieve the global vars? 1. AppDelegate.h extern Variable? 2. Global vars using a new class file? 3. Create a Singleton? 4. Idk if this work, but creating a class method that set and return a static var. every site i check says: this should not be done... :/ so how i'm supposed to do it? In my mind i think about creating an answerController class where all my views write on it... but that it's a singleton, ritgh? and i should not use it. Why? thanx!