在导航控制器上添加按钮(来自代码)并使它们消失 [英] add buttons(from code) on the Navigation Controller and make them disappear

问题描述

我在视图控制器"上方的代码中添加了一个按钮:

I have added a button from the code above "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");
}

...但是如何隐藏按钮?

...But how can I hide the button?

推荐答案

self.navigationItem.rightBarButtonItem = nil;

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