Unable to present a view controller from AppDelegate

Question

I need to present a view controller from app delegate.

When a phone notification comes in, I am able to decide which one of 3 view controllers (named ForumViewController, BlogViewController & NewsViewController) should be presented by analyzing the 'userInfo' in the method 'didReceiveRemoteNotification'.

But when i try to present the appropriate view controller using storyboards or the code below:

self.viewController = [[MembersViewController alloc] initWithNibName:@"MembersViewController" bundle:nil];
        self.window.rootViewController = self.viewController;
        [self.window makeKeyAndVisible];

Then, the app gives the error 'Warning: Attempt to present whose view is not in the window hierarchy!'. Also it gets stuck on a particular view controller.

Please keep in mind that the view controllers that I am trying to present are not part of the flow when the app starts (the flow is LogoViewController -> SplashViewController -> HomeViewController).

The HomeViewController & MembersViewController are essentially the main menu pages for public & private viewing. Here I have to display something to the viewer.

Answer 1

choice-1

using push

 UINavigationController *navController = (UINavigationController *)self.window.rootViewController;
MembersViewController *vc = [navController.storyboard instantiateViewControllerWithIdentifier:@"MembersViewController"];

[navController pushViewController:vc animated:YES];

using present

MembersViewController *root = (MembersViewController *)self.window.rootViewController;
UIViewController *vc = [root.storyboard instantiateViewControllerWithIdentifier:@"MembersViewController"];

[root presentViewController:vc animated:YES completion:NULL];  

upadted

  UIStoryboard *mainstoryboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
MembersViewController* pvc = [mainstoryboard instantiateViewControllerWithIdentifier:@"MembersViewController"];
[self.window.rootViewController presentViewController:pvc animated:YES completion:NULL];

Answer 2

Loading a view controller from the storyboard:

[self performSelector: @selector(ShowModalViewController) withObject: nil afterDelay: 0];

-(void)ShowModalViewController{
 NSString * storyboardName = @"MainStoryboard"; 
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
    UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"IDENTIFIER_OF_YOUR_VIEWCONTROLLER"];
    [self.window.rootViewController presentViewController:vc animated:YES completion:nil];
}

Identifier of your view controller is either equal to the class name of your view controller, or a Storyboard ID that you can assign in the identity inspector of your storyboard.