Setting the title of a navigation bar inside a tab bar controller

Simple!

[self.tabBarController setTitle:@"Title"];

Adding on to ghostrider's solution, in the mytabbarcontroller.m self.navigationItem.title didn't work for me. I have a NavigationController whose detail view is a TabController and this is what I have in my first tab implementation

self.navigationController.visibleViewController.title = ski_center;

In Swift 4 and above

self.tabBarController?.title = "Title"