Left bar button Item

问题

so if you have a navigation controller with no bar button Items then a navigation back button will show up with the name of the last View Controller and I want to keep that, as in I don't want to have to hardCode it. and I do know how to add it in but I don't want to have to do that because that leaves more room for bugs. Is there a way that I can have a left bar button Item and the default one doesn't go away?

回答1:

Add this in viewController where you want to have default back button and custom bar button item. You can customise the bar button item.

override func viewDidLoad() {
    super.viewDidLoad()
    let newBtn = UIBarButtonItem(title: "new", style: .plain, target: self, action: #selector(anotherMethod))
    self.navigationItem.leftItemsSupplementBackButton = true
    self.navigationItem.leftBarButtonItem = newBtn//self.navigationItem.leftBarButtonItems = [newBtn,anotherBtn]
}

来源：https://stackoverflow.com/questions/43254254/left-bar-button-item