如何从一个特定的视图控制器隐藏导航栏

Question

我创建了一个两个闪屏的iPhone应用程序。之后用户被带到第一个视图。我添加了一个UINavigationController。它工作得很好。

如何单独删除打开视图的导航栏？

主窗口

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    


self.splashScreen = [[SplashScreen alloc] 
                initWithNibName:@"SplashScreen" 
                bundle:nil];
if (self.pageController == nil) {
openingpage *page=[[openingpage alloc]initWithNibName:@"openingpage" bundle:[NSBundle mainBundle]];
    self.pageController = page;
    [page release];
}
[self.navigationController pushViewController:self.pageController animated:YES];

[window addSubview:splashScreen.view];

 [splashScreen displayScreen];
[self.window makeKeyAndVisible];

return YES;
 }

Answer 1

因此，如果您在某些视图中，控制器必须使用此方法：

[self.navigationController setNavigationBarHidden:YES animated:YES];

---

更多说明：

UINavigationController有一个属性navigationBarHidden，它允许你隐藏/显示整个导航控制器的导航栏。

让我们在下一个等级中掠夺：

--UINavigationController
------UIViewController1
------UIViewController2
------UIViewController3

三个UIViewController中的每一个都有导航栏，因为它们位于UINavigationController中。例如，你想将bar隐藏到第二个（实际上它与哪一个无关），然后写入UIViewController2：

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self.navigationController setNavigationBarHidden:YES animated:YES];   //it hides  
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:YES]; // it shows
}

Answer 2

斯威夫特4：

terraform env

Answer 3

这对我有用：

雨燕4

INDEX(data_id, customer_id)

Answer 4

最好记住它是否以前被隐藏了：

private var navigationBarWasHidden = false

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    // Save if it was hidden initially
    self.navigationBarWasHidden = self.navigationController?.isNavigationBarHidden ?? false
    // Hide the Navigation Bar
    self.navigationController?.setNavigationBarHidden(true, animated: animated)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    // Show the Navigation Bar
    self.navigationController?.setNavigationBarHidden(self.navigationBarWasHidden, animated: animated)
}

Answer 5

使用下面一行代码隐藏Swift3和Swift4中的导航栏

            CheckBox active = (CheckBox)editableItem["valid"].Controls[0];
        Boolean bactive = active.Checked;

显示导航栏

navigationController?.setNavigationBarHidden(true, animated: true)

Answer 6

在c＃或Xamarin.IOS中， this.NavigationController.NavigationBar.Hidden = true;

Answer 7

以模态方式显示开场视图，或;

1. 不要将其添加到导航控制器
2. 在导航控制器之前显示。
3. 一旦加载了所有内容，请关闭开始视图并显示导航控制器（两者都没有动画）。

---

以此话题为例：How can I display a splash screen for longer on an iPhone?

-(void)applicationDidFinishLaunching:(UIApplication *)application {
    [window addSubview:splashView];
    [NSThread detachNewThreadSelector:@selector(getInitialData:) 
                                 toTarget:self withObject:nil];
}

-(void)getInitialData:(id)obj {
    [NSThread sleepForTimeInterval:3.0]; // simulate waiting for server response
    [splashView removeFromSuperview];
    [window addSubview:tabBarController.view];
}