导航栏未显示 [英] Navigation bar not showing

问题描述

这里有2个视图:

• WelcomeVC
• WebViewVC

首先 AppDelegate 通过以下代码调用 WelcomeVC :

First AppDelegate calls WelcomeVC through this code below:

- (void)presentWelcomeViewController 
    WelcomeViewController *welcomeViewController = [[WelcomeViewController alloc] initWithNibName:@"WelcomeViewController" bundle:nil];

    welcomeViewController.title = @"Welcome to My App";

    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:welcomeViewController];
    navController.navigationBarHidden = YES;

    self.viewController = navController;
    self.window.rootViewController = self.viewController;
}

因此，在 WelcomeVC 中，导航栏未显示为navController.navigationBarHidden = YES;.在 WelcomeVC 中，有一个按钮可以调用 WebViewVC ，如下所述:

So in WelcomeVC, navigation bar is not shown with navController.navigationBarHidden = YES;. In WelcomeVC, there is a button to call WebViewVC as detailed below:

- (IBAction)termsPressed:(id)sender {
    WebViewController *webViewController = [[WebViewController alloc] initWithNibName:nil bundle:nil];
    NSLog(@"Terms of Use");
    webViewController.urlPassed = @"http://.../term.html";
    webViewController.title = NSLocalizedString(@"Terms of Use", nil);
    [webViewController.navigationController setNavigationBarHidden:NO animated:NO];
    [self.navigationController presentViewController:webViewController animated:YES completion:^{}];    
}

按下此按钮时，我希望它调用 WebViewVC ，并在显示导航栏的同时显示[webViewController.navigationController setNavigationBarHidden:NO animated:NO];，但是我发现的是 WebViewVC ，但没有导航栏仍然.我还在 WebViewVC 中包含了viewDidLoad，如下所示:

When this button is pressed, I want it to call WebViewVC with navigation bar presented as I do [webViewController.navigationController setNavigationBarHidden:NO animated:NO]; but what I found is WebViewVC is presented without navigation bar still. I also include viewDidLoad in WebViewVC as shown below:

- (void)viewDidLoad {
    [super viewDidLoad];

    CGSize screenSize = [[UIScreen mainScreen] bounds].size;
    if(screenSize.height == 480)
    {
        webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
    }
    else if(screenSize.height == 568)
    {
        webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 568)];
    }

    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlPassed]]];
    [self.view addSubview:webView];
}

有人在我想念我的地方或做错什么的地方帮我吗?这将不胜感激.预先感谢！

Does anyone please help guide me where I am missing or doing wrong? That would be greatly appreciated. Thanks in advance!

推荐答案

在这里，我找到了一种解决方案，方法是更改​​ WelcomeVC 中按钮的代码:

Here I found a solution by changing code for the button in WelcomeVC:

- (IBAction)termsPressed:(id)sender {
    WebViewController *webViewController = [[WebViewController alloc] initWithNibName:nil bundle:nil];
    NSLog(@"Terms of Use");
    webViewController.urlPassed = @"http://.../term.html";

    UINavigationController *webViewNavController =[[UINavigationController alloc] initWithRootViewController:webViewController];

    webViewNavController.navigationBarHidden = NO;

    webViewNavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    [self presentViewController:webViewNavController animated:YES completion:nil];

}

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