Change font of back navigation bar button

Question

I want to be able to set the font of my apps navigation bar back button without doing anything too crazy and without losing any other design characteristics of the button (i

Answer 1

Swift 3.0+

AppDelegate.swift

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.font: UIFont(name: "myFont", size: 17.0)!], for: .normal)