R – viewDidAppear Not Firing in Tabbarcontroller>NavigationController>UITableView

I currently have a tab bar controller set up with a navigationcontroller on one of the tabs, then I have a UITableView nib set up for that Navigationcontrollers view. All of this has been set up through IB and I want to keep it that way. Kind of like this tutorial http://twilloapp.blogspot.com/2009/05/how-to-embed-navigation-controller.html
now the view loads perfectly when ViewDidLoad is called. But when I then load further views via code IE

MyApp_AppDelegate *delegate = [[UIApplication sharedApplication] delegate];

UINavigationController *nav = (UINavigationController *)delegate.controller.selectedViewController;

newViewController = [[newViewController alloc] initWithNibName:@"newView" bundle:nil];

[nav pushViewController:newViewController animated:YES];

//At this point the view works! and loads

If I try to go back with the navigation toolbar it goes back to my previous view fine
Now I need to refresh the tableview when I go back but calling viewDidAppear does not work.

I tried adding UINavigationDelegate to the same ViewController Class as the tableview and then calling - (void)navigationController:(UINavigationController *)navigationController didShowViewController:

But that did not work. I also tried adding the same delegate as the tab bar controller and adding the same navigationController didShowViewController: there but that also failed.

How do I get this table to refresh every time the view loads?