How to remove all navigationbar back button title

Question

When I push a UIViewController, it has some title in back button at new UIViewController, if the title has a lot of text, It does not look good in

Answer 1

in viewDidLoad()

    let backBarButtonItem = UIBarButtonItem(title: nil, style: .plain, target: nil, action: nil)
    navigationItem.backBarButtonItem = backBarButtonItem