CODEWITHSUNDEEP
objective-cuinavigationcontrolleruibarbuttonitemxcode4.5osx-mountain-lion
Ramy Al Zuhouri
Ramy Al Zuhouri

Reputation: 21966

Can't set the title of the back bar button item of a view controller

I am training myself with an application that has a navigation controller, and the user can switch between two view controllers.
The root view controller class is called ViewController, and that's how I programmatically add the navigation controller in my app delegate: 

self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
navController= [[UINavigationController alloc]initWithRootViewController: viewController];
self.window.rootViewController= navController;

This is navController: 

@property (strong, nonatomic) UINavigationController* navController;

The second view controller is called SecondViewController.I push it whenever the user clicks on the bar button item: 

self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc]initWithTitle: @"Second View" style: UIBarButtonItemStylePlain target: self action: @selector(switchView:)];

This is the selector executed: 

- (void) switchView : (id) sender
{
    if(!nextController)
    {
        nextController= [[SecondViewController alloc]initWithNibName: @"SecondViewController" bundle: nil];
    }
    [self.navigationController pushViewController: nextController animated: YES];
}

Then in the second view controller appears automatically a button with the title "back", that switches to the first view.That's fine to me, but I would like to set the title and the style.So I'm trying to change the title: 

self.navigationItem.backBarButtonItem.title= @"First View";

But nothing to do, the title is still "back", how do I change it?

Also, ain't I following a wrong or unefficient approach, right?

Upvotes: 0

Views: 1444

Answers (2)

Joe Hankin
Joe Hankin

Reputation: 960

If you set the title property of your ViewController class in viewDidLoad, that string will appear as the text of your back button when you push a SecondViewController onto the stack.

Upvotes: 2

Mark S
Mark S

Reputation: 2211

Try this for changing the button title. Init and add your own leftBarButtonItem and hide the stock back button.

UIBarButtonItem* backBtn =  [[UIBarButtonItem alloc] initWithTitle:@"BUTTON_NAME" style:UIBarButtonItemStyleDone target:self action:@selector(backAction)];

self.navigationItem.leftBarButtonItem = backBtn;
self.navigationItem.hidesBackButton = YES;

You're going to want to hide the original back button if you can and just make a backAction which can be something that uses the popViewcontrollerAnimated function (if you pushed the viewcontroller on to begin with). 

- (void) backAction {
    [self.navigationController popViewControllerAnimated:YES];
}

Upvotes: 1

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