How do view controllers in tabbar controller communicate -iphone

Question

In my app I need to communicate two viewcontrollers which are inside a tabbarcontroller.

That is the value of an object in viewcontroller in first tab index can be changed from viewcontroller in second tabindex.

Thanks in advance

Answer 1

For this kind of stuff I usually use NSNotifications. I've answered a similar question here: passing data objects between view-controllers