This is the sample code that accompanies my tutorial for beginning iOS programmers on how to make classes, especially view controllers, communicate with each other. You can find this three-part tutorial on my blog at:

• http://www.hollance.com/2011/04/making-your-classes-talk-to-each-other-part-1/
• http://www.hollance.com/2011/04/making-your-classes-talk-to-each-other-part-2/
• http://www.hollance.com/2011/04/making-your-classes-talk-to-each-other-part-3/