Currently I have a `UITableViewController` which displays a list of items from an array **within** that controller implementation file. Now, I would like to have a button on the top right, which, when you press it, brings you to a simple page in which you can add an item to the list on the previous page. When you are done adding the item, it just brings you back to the list, which now has one more item in it. 

So, I have a `navigationController` leading into my `tableViewController` and a button which "pushes" you to the add item page. 

How do I access a reference to the tableViewController, so that I can call my `-(void)addNewItem:(NSString *) name;` method?