UINavigationBar Large Title Ghosting

Question

When tapping the back button in my UINavigationBar the small title becomes a large title but with a strange ghosting effect during the animation.

Has anyone seen this before and/or know how to correct it?

Answer 1

For future reference, the ghosting will happen when you only set appearance attributes for the normal control state:

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font : UIFont.barButtonBody()], for: UIControl.State.normal)

To prevent the ghosting, you also need to set it for the highlighted state:

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font : UIFont.barButtonBody()], for: UIControl.State.highlighted)