titleTextAttributes UIAppearance font in iOS 7

Question

I am using UIAppearance to apply fonts to UINavigationBar and UIBarButtonItem and I am having problems. I ran this code:

[[UIBarButtonItem appearanceWhenCont         


        

Answer 1

Here is how to globally change the nav bar title's text color in Swift 4:

UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor.rawValue: UIColor.yellow]