How do I share an object between UIViewControllers on iPhone?

Question

My application is a tab bar application, with a separate view controller for each tab.

I have an object in my first view controller (A) which contains all my stored

Answer 1

The most common way I've seen this is to set up the thing you want to access in the app delegate and reference it in other places like this:

MyAppDelegate *appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate]; 
myStuff = appDelegate.stuff;

In the app delegate, set up a stuff variable and use @property and @synthesize as usual.

Some people say that it's not a good approach, since it's the same as using global variables, but it's very common.