AppDelegate, rootViewController and presentViewController

appdelegate, facebook, ios6, objective-c, xcode

Solution

I had the same issue. Based on the answer to this question, I added `[self.window makeKeyAndVisible]` just before `presentViewController:animated:completion:`, and that fixed it for me.

In your case, showLoginView becomes

- (void)showLoginView
{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    LoginViewController *loginViewController = [storyboard instantiateViewControllerWithIdentifier:@"LoginViewController"];
    [self.window makeKeyAndVisible];
    [self.window.rootViewController presentViewController:loginViewController animated:YES completion:NULL];
}

Problem

I'm doing the Facebook integration tutorial, I want to show my MainViewViewController if the user has a valid token for the current state otherwise I want to show LoginViewController. MainViewAppDelegate.m ``` - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { if (FBSession.activeSession.state == FBSessionStateCreatedTokenLoaded) { // To-do, show logged in view } else { // No, display the login page. [self showLoginView]; } return YES; } - (void)showLoginView { UIStoryboard *mainstoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; LoginViewController* loginViewController = [mainstoryboard instantiateViewControllerWithIdentifier:@"LoginViewController"]; [self.window.rootViewController presentViewController:loginViewController animated:YES completion:NULL]; } ``` Console error : ``` Warning: Attempt to present <LoginViewController: 0xb492fd0> on <MainViewViewController: 0xb1bd820> whose view is not in the window hierarchy! ``` I don't want to use a NavigationController.

Original source