NavigationController not loading view

Question

I'm using xCode 4.3.2 and started a blank application.

I have a navigation controller and a simple logincontroller. I want the login controller to be my root view so it is this first thing that a user does when they login.

I'm using the following code and when I run the application it displays a black screen. I put in logging in the LoginViewController.m->ViewDidLoad and it is being run is there something im doing wrong the LoginViewController.xib is very simple it just contains a button right now that will switch to a tab view controller once I figure this out.

Thanks in advance.

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:     (NSDictionary *)launchOptions
    {
        UIViewController *loginController = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];
        navigationController = [[UINavigationController alloc] initWithRootViewController:loginController];



        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        [self.window addSubview:navigationController.view];
        [self.window makeKeyWindow];


        return YES;
    }

try self.window.rootViewController = navigationController instead of adding the nav controller's view as a subview in window. — nielsbot
– nielsbot, Commented Aug 28, 2012 at 17:36
@nielsbot I tried that still getting a black screen. I also tried self.window.rootViewController = loginController; and had the same problem. Does this mean the problem is in my LoginViewController??? — Tony
– Tony, Commented Aug 28, 2012 at 18:15
could be.. might want to make sure viewDidLoad and viewDidAppear are being called on your view controller, and check the frame of your view and whether its superview ≠ nil — nielsbot
– nielsbot, Commented Aug 28, 2012 at 19:06
Both viewDidAppear, and viewWillAppear are never hit... how do I check its superview ? — Tony
– Tony, Commented Aug 28, 2012 at 19:21
assert( view.superview ) but this won't be set until after viewDidAppear: is called. Note: It's -viewDidAppear:, not -viewDidAppear — nielsbot
– nielsbot, Commented Aug 28, 2012 at 19:23

David Hoerl · Accepted Answer · 2012-08-28 17:36:37Z

1

This is not right:

[self.window addSubview:navigationController.view];

change it to this:

self.window.rootViewController = navigationController;

answered Aug 28, 2012 at 17:36

David Hoerl

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2 Comments

Tony Over a year ago

Still only displays a blank screen.

David Hoerl Over a year ago

Then comment out almost all the code and just do self.window.rootViewController = loginController;, and I'm going to guess that will be black too meaning something is wrong with that login controller - the nib name is misspelled, or nib is not included in project, etc.

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