Hiding UINavigationItem's bar button

Question

I have added a BarButton item to the left of the nav.bar through Interface Builder and in the code I want this only to show in my table view\'s edi

Answer 1

I'm pretty sure the only way to "hide" it is to nil it out.

self.navigationItem.leftBarButtonItem = nil;

Though it's not a perfect answer to your question, since that basically gets rid of your button instead of hiding it. You'll either have to recreate it or keep your original button around and simply set the leftBarButtonItem back to your UIBarButtonItem.

Answer 2

This works I tried it myself

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

Answer 3

I just created my own "hide" function show below:

- (void)hideClearButton:(BOOL)hide {

    if (hide) {
        self.navigationItem.leftBarButtonItem = nil;
    }
    else {
        self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
                                                 initWithTitle:NSLocalizedString(@"Clear", @"Recents")
                                                 style:UIBarButtonItemStylePlain
                                                 target:self action:@selector(clearAll:)];

    }
}

You can just call it like:

[self hideClearButton:YES]; //hide it

or

[self hideClearButton:NO];  //show it

Answer 4

Well making it nil was not a option because i wanted to show it again and didnt want to create a button again.

so what i did was

 UIBarButtonItem *barButton =  (UIBarButtonItem *)self.navBar.topItem.leftBarButtonItem;
 barButton.customView.hidden = true;//Hide
 barButton.customView.hidden = false;//Show

Works for me. (my leftBarButtonItem was created using customView)

Hope it helps.

Answer 5

You can use

// Hide
self.navigationItem.leftBarButtonItem = nil;

// Show
self.navigationItem.leftBarButtonItem = self.myBarButtonItem

The key is making sure that you have a strong reference to the button item before nilling leftBarButtonItem.

@property (strong, nonatomic) IBOutlet UIBarButtonItem *myBarButtonItem;

Answer 6

You can use

[self.navigationItem.leftBarButtonItem setEnabled:TRUE];

as there is no other way to hide it. so just disable it.