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Add buttons (from code) to the navigation controller and make them disappear


I added a button from the code above the "view controller":

@implementation HBViewController
.....
.....
.....

- (void)viewDidLoad
{
    [super viewDidLoad];
    okButton = [[UIBarButtonItem alloc] initWithTitle:@"Ok" style:UIBarButtonItemStyleBordered target:self action:@selector(okayButtonPressed)];

    [self.navigationItem setRightBarButtonItem:okButton animated:NO];

}

- (void) okayButtonPressed{
NSLog(@"you pressed ok");
}

... But how can I hide the button?

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3 answers
self.navigationItem.rightBarButtonItem = nil;
+1
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            //to disable

        self.navigationItem.rightBarButtonItem.enabled = NO;

            //to hide - hide means setting nil will remove that button

        self.navigationItem.rightBarButtonItem = nil;


            //if u want to show again then create and assign new button again

        okButton = [[UIBarButtonItem alloc] initWithTitle:@"Ok" 

                  style:UIBarButtonItemStyleBordered

                  target:self action:@selector(okayButtonPressed)];

        [self.navigationItem setRightBarButtonItem:okButton animated:NO];
+2
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Just install it nil

[self.navigationItem setLeftBarButtonItem:nil animated:YES];
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