NavigationController Header Disappears when loading from AppDelegate

Question

In my AppDelegates 'didFinishLaunchingWithOptions' function, I have this code in there:

if(loggedIn != nil)
    {
        MainViewController *mvc = [self.window.rootViewController.storyboard instantiateViewControllerWithIdentifier:@"MainView"];
        [self.window setRootViewController:mvc];

    }

Second Attempt which didn't work:

if(loggedIn != nil)
    {
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        MainViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"MainView"];
        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
        [self.window setRootViewController:nav];

    }

The problem is that when the MainViewController loads, the NavigationHeader is missing. I've tried various methods online and instantiations that basically do the same thing to no avail. I have also tried created a whole new navigationController and adding my view to it, however, that fails as well.

Set the `MainViewController` into `UINavigationController` and your problem will be solved. — Adeel Ur Rehman, Dec 17 '14 at 10:00

Simon McLoughlin · Accepted Answer · 2014-12-17T10:04:37.070

2

Your setting MainViewController as your root, if this is not a navigation controller, there will be no header when it opens.

Instead create a UINavigationController, set MainViewController as its root and then set the navigation controller as the window root.

e.g.

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"storyboardName" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"home"];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
[self.window setRootViewController:nav];

or if you have the navigation controller inside the storyboard then instantiate that. Most likely the initial view controller.

e.g.

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"storyboardName" bundle:nil];
[self.window setRootViewController::[storyboard instantiateInitialViewController]];

not sure if it will be the initial viewController or not, that requires more info of your setup to know.

edited Dec 17 '14 at 10:04

answered Dec 17 '14 at 09:59

Simon McLoughlin

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@MohamadBataineh which method did you use. Please edit your question and post your current code – Simon McLoughlin Dec 17 '14 at 11:09
I used your first example. – Moe Bataineh Dec 17 '14 at 11:11
@MohamadBataineh have you checked each variable to make sure its not nil? the storyboard, the viewController etc. – Simon McLoughlin Dec 17 '14 at 11:15
@MohamadBataineh Are you running other code somewhere? have you checked that the viewDidLoad, viewWillAppear etc is being called? The same code has been given before: http://stackoverflow.com/questions/10827010/selecting-alternative-first-view-controller-from-story-board-at-application-star and i'm using it myself and it works fine – Simon McLoughlin Dec 17 '14 at 11:25
It appears I made it mistake in my viewDidLoad. I needed to clear the navigation queue incase the user navigated from somewhere else in the website and forgot to remove the code. This is my bad. Sorry about that. – Moe Bataineh Dec 17 '14 at 11:28

NavigationController Header Disappears when loading from AppDelegate

1 Answers1