Question

is there a simple way (Delegation? Overwriting?) do globally customize all the back buttons that are being used in the navigationBar throughout my whole app?

Best
–f

Answer 1

Could you be more specific about your goal? For most attempts to change an object’s behviour globally, you can ‘swizzle’ one or more methods, that is, switch the supplied implementation for your home cooking. It’s not possible to know if that can work for you without knowing what you want to achieve.

All I want to do is use a custom
UIButton (with a specific graphic) for
the UIBarButtonItem of the backButton.

In that case, consider creating a navigation controller factory method (probably as a class method on a class of your creation, but you could also do it in a category on UINavigationController that returns a navigation controller instance configured to your liking. Whenever you need a UINavigationController, call that factory method instead of the default initialiser.