How to set backButton text to empty?

问题

I tried this code:

navigationController?.navigationItem.backBarButtonItem?.title = ""

but it does not work and did not change anything. How can I set backButton text to empty?

回答1:

I tried this code for back button title. and it's work correctly

 let barButton = UIBarButtonItem()
 barButton.title = ""
 self.navigationController?.navigationBar.topItem?.backBarButtonItem = barButton

回答2:

self.navigationController!.navigationBar.topItem!.title = ""

回答3:

You should use:

navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)

for see just < instead of < viewController

回答4:

You have to change the previous controller's title, try doing so before the segue in the viewDidDisappear

回答5:

To remove the backButtonItem's title, place this line of code in the viewDidLoad: of the View Controller that the backButtonItem is in:

navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, 
target: nil, action: nil)

回答6:

self.navigationItem.leftBarButtonItem=nil;

or

self.navigationItem.backBarButtonItem=nil;

来源：https://stackoverflow.com/questions/34288419/how-to-set-backbutton-text-to-empty