ios - setNavigationBarHidden :NO is appearing when dismissed

Question

我想让导航栏在使用关闭按钮关闭时消失，或者在关闭屏幕时让导航栏隐藏。

代码如下:

- (void)viewDidLoad
{

    [self.navigationController setNavigationBarHidden:FALSE ];

    self.title=@"Cookie Policy";

    NSString *htmlFile = [[NSBundle mainBundle] pathForResource:@"Cookie Policy" ofType:@"html"];
    NSString* htmlString = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
    [webView loadHTMLString:htmlString baseURL:nil];



    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0, 0, 20, 32);
    button.titleLabel.font=[UIFont boldSystemFontOfSize:15];
    [button setTitle:@"X" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(openView) forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *barButton=[[UIBarButtonItem alloc] init];
    [barButton setCustomView:button];
    self.navigationItem.leftBarButtonItem=barButton;

}

当按下 setTitle:@"X" 时，我会在 UI 的所有其他屏幕上看到导航栏。换句话说，导航栏在所有其他屏幕中重叠(置于最前面)。我为所有屏幕使用 Storyboard。我认为必须在代码中进行更改。

请指教

Answer 1

我通过添加以下代码行解决了该问题:

    _nav.navigationBarHidden = YES;

不需要接触 Storyboard 中的任何内容。