iPhone dev Stupidity 82: change the title of "back" button in nav

From stackoverflow: you gonna change it in parent view controller - the one just under the stack.

// set the category

// .. get parent

NSArray * viewControllerArray = [self.navigationController viewControllers];

int parentViewControllerIndex = [viewControllerArray count] - 2;

UIViewController * parent_vc = [viewControllerArray objectAtIndex: parentViewControllerIndex];

// .. if the category changed

if(![parent_vc.navigationItem.backBarButtonItem.title isEqualToString: cat_name]){

 // update the back button title

 UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle: cat_name style: UIBarButtonItemStyleBordered target: nil action: nil];

 parent_vc.navigationItem.backBarButtonItem = newBackButton;

 [newBackButton release];

}