NavigationBar后退按钮在popViewController之后更改文本

Question

I have a UINavigationController connected to a UITabBarCotnroller . When i push a ViewController and in that class i write this code in their viewWillAppear method

    self.navigationController?.navigationBarHidden = false
    let yourBackImage = UIImage(named: "Back.png")
    self.navigationController?.navigationBar.backIndicatorImage = yourBackImage
    self.navigationController?.navigationBar.backIndicatorTransitionMaskImage = yourBackImage
    self.navigationController!.navigationBar.backItem?.title = "";

By this code i am just setting a back button image with empty title. But when i push another screen over the current pushed screen and then tap back it again shows the title with text "Back" I am writing the above code in every view controller's viewWillAppear method which will be push.

Answer 1

While I believe setting the backIndicatorImage and backIndicatorTransitionMaskImage will work in viewDidAppear() , I found issues with setting the back text itself. I always had to set the text with a new button, and even then, it worked better for me to do it from the transitioning controller (as that's the view they would go back to, so I didn't have to care where the user was transitioning from).

You can try using this in your viewWillAppear() , but I'm using this in my prepare(for:, sender:) function.

let backItem = UIBarButtonItem()
backItem.title = "" // In my case, I was setting it here; you would blank it out
self.navigationItem.backBarButtonItem = backItem