backButtonTitle
The custom title of the Back button.
Declaration
var backButtonTitle: String? { get set }Discussion
Use this property to set the title of the Back button when a view controller’s navigationItem is the backItem of the navigation bar, in other words, when the Back button appears in the navigation bar of the next view controller. For example, a view controller that displays a list of contacts can set backButtonTitle to “Contacts”. When a person taps a contact, the view controller pushes a new view controller onto the navigation stack, which displays the details of the selected contact. This new topmost view controller shows “Contacts” as the Back button title.
Interface Builder shows this behavior when setting the Back button title in a storyboard, as shown in the following screenshot:
[Image]
When setting backButtonTitle programmatically, set it in the current view controller before pushing a new view controller onto the navigation stack; for instance, in viewDidLoad() or viewWillAppear(_:).
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.backButtonTitle = "Contacts"
}When backButtonTitle is nil, which is the default value, the navigation item uses its title property as the Back button title.