How to change the title of the UINavigationBar back button to “Back”

问题

When I push a view onto the navigation controller the back button's title get's set to the title of the previous view. How can I get the back button to just say "Back"?

回答1:

Write this code in your viewwillappear:

UIBarButtonItem *_backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleDone target:nil action:nil];
self.navigationItem.backBarButtonItem = _backButton;
[_backButton release];
_backButton = nil;

回答2:

In the previous view controller, have it set its title in viewWillAppear, and then in the code that pushes the new view controller, have it change its title to 'Back.'

Example:

-(void)showNextScreen{
     [self setTitle:@"Back"]; 
     [self.navigationController pushViewController:asdf animated:YES];
}
-(void)viewWillAppear{
     [super viewWillAppear];
     [self setTitle:@"My Actual Title"];
}

来源：https://stackoverflow.com/questions/8046622/how-to-change-the-title-of-the-uinavigationbar-back-button-to-back