Conditional Navigation Controller Root

Question

I have a tab bar controller into a navigation controller. I want to change the navigation controller's root view depending on whether or not a user is logged in. How do I do this? I don't want to put the code in didFinishLaunchingWithOptions: or any other AppDelegate method because it won't be the first thing the users will see.

See this: [http://stackoverflow.com/questions/6717260/iphone-replacing-rootview-in-navigation-controller][1] [1]: http://stackoverflow.com/questions/6717260/iphone-replacing-rootview-in-navigation-controller — ddevaz, Aug 12 '13 at 23:10
In the first answer, I do not know what this array contains. `setViewControllers:[NSArray arrayWithObject:detailViewController]` — Richard McCluskey, Aug 13 '13 at 03:41

score 1 · Accepted Answer · answered Aug 13 '13 at 16:05

1

You're right, its supposed to be:

- (void) goNext {
NextViewController* nextWindow = [[NextViewController alloc] initWithNibName:@"NextView" bundle:nil];
[self.navigationController setViewControllers:[NSArray arrayWithObject:nextWindow] animated:YES];
}

Since you can't pop the root view controller, the following method can be used instead:

- (void)setViewControllers:(NSArray *)viewControllers animated:(BOOL)animated

Here's a link to the apple docs for this method.

answered Aug 13 '13 at 16:05

ddevaz

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So I put in the goNext code as this `NextViewController* nextWindow = [[NextViewController alloc] init]; [self.navigationController setViewControllers:[NSArray arrayWithObject:nextWindow] animated:YES];` since I am using storyboards and not Nibs, but when it changes ViewControllers, the screen is black. It doesn't have the buttons or any other UIElements I put in. – Richard McCluskey Aug 13 '13 at 17:26
I found the problem. Since I am using Storyboards, this code worked for me. `- (void) goNext { UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle: nil]; NextViewController* nextWindow = [storyboard instantiateViewControllerWithIdentifier:@"NextView"]; [self.navigationController setViewControllers:[NSArray arrayWithObject:nextWindow] animated:YES]; }` – Richard McCluskey Aug 13 '13 at 17:45
cool, glad you got it to work. Yes, I should have mentioned that re-instantiating the controller is necessary when using storyboards. – ddevaz Aug 13 '13 at 17:51

Conditional Navigation Controller Root

1 Answers1