Can't access TabBarController from ImageView

Question

I have an app that has a navigation controller in a tabbar controller. The root for the navigation controller is a table view controller. The table view has a segue to an image view. I want to update the badge value on a tab from the image view controller. From the tabbar controller, this works fine:

UIViewController *viewController = [self.tabBarController.viewControllers objectAtIndex:1];
viewController.tabBarItem.badgeValue = @"x";

But when I put the same code into the imageview controller, it doesn't work. When I check the value of 'viewController' after it executes, the value is nil. Same for self.tabBarController. For some reason the image view controller can't see its tabbarcontroller.

Answer 1

You should be able to access the tabBarController with self.navigationController.tabBarController. So your code needs to be:

UIViewController *viewController = [self.navigationController.tabBarController.viewControllers objectAtIndex:1];
viewController.tabBarItem.badgeValue = @"x";