Ios 如何从一个特定的视图控制器中隐藏导航栏

发布于02月11日

我已经创建了一个两屏的iPhone应用程序.之后，用户被带到第一个视图.我添加了一个UINavigationController.它工作得非常好.

如何仅删除打开视图的导航栏？

MainWindow个

- (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;
 }

推荐答案

在视图控制器中try 此方法:

// swift
self.navigationController?.setNavigationBarHidden(true, animated: true)

// objective-c
[self.navigationController setNavigationBarHidden:YES animated:YES];

更多说明:

UINavigationController有一个属性navgationBarHidden，它允许您隐藏/显示整个导航控制器的导航栏.

让我们看看下一个层次 struct :

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

三个UIViewController中的每一个都有相同的导航栏，因为它们都在UINavigationController中.例如，您希望隐藏UIViewController2的栏(实际上在哪个栏中并不重要)，然后在您的UIViewController2中写入:

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

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