在导航控制器中设置后退按钮

Question

So I have 3 View controllers : V1, V2 and V3. When I press a button on V1 it shoots me over to V3. I would like to keep the "Back Arrow" but change the text there. I have tried many things but the word back either reapers when the view is shown or my code does not work.

Any Suggestions?

I already used this code

self.navigationController?.navigationBar.topItem?.backBarButtonItem = UIBarButtonItem(title: "YO", style: .Plain, target: nil, action: nil)

let backbutton = UIButton(type: .Custom)
backbutton.setImage(UIImage(named: "BackButton.png"), forState: .Normal) // Image can be downloaded from here below link
backbutton.setTitle("Back", forState: .Normal)
backbutton.setTitleColor(backbutton.tintColor, forState: .Normal) // You can change the TitleColor
backbutton.addTarget(self, action: "backAction", forControlEvents: .TouchUpInside)

self.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backbutton)

func backAction() -> Void {
    self.navigationController?.popViewControllerAnimated(true)
}

I tried creating my Button with this code I found on Stack But the button disappeared and the back button appeared in its place again.

Answer 1

You can set navigationItem.leftBarButtonItem to a button of your own design. That overrides backBarButtonItem , and iOS will not replace your text with "Back". But if you want an arrow you would have to design it yourself as part of your button.

In my code I set the button whenever the title is changed:

override var title:String? {
    get {
      return super.title
    }
    set {
      super.title = newValue
      if (navigationController?.childViewControllers.count > 1) {
        let backButton = // ... custom button
        navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backButton)
        backButton.addTarget(self, action: "backAction", forControlEvents: .TouchUpInside)
      } else {
        navigationItem.hidesBackButton = true
      }