Question

I’d like to add a UINavigationController to my app info view (NOT to my main view). I’ve watched/read a number of tutorials showing how to add it to the main window through the AppDelegate using IB. In my case, I only want it to appear when a user presses the info button and is brought to the infoView. Here is how I switch to the infoView within my MainViewController:

- (IBAction)infoButtonPress:(id)sender
{
    // Create pointer to instance of InfoViewController
    InfoViewController *infoView = [[InfoViewController alloc] initWithNibName:@"InfoViewController" bundle:nil];
    // Add view switching animation
    infoView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    // Change view using animation
    [self presentModalViewController:infoView animated:YES];    
}

At this point the infoView is displayed and I would like THIS to be the RootView of the UINavigationController. I have tried adding the line:

UINavigationController *infoNavController = [[UINavigationController alloc] 
                                             initWithRootViewController:infoView];

after creating an instance of InfoViewController, but the app crashes. Is it possible to add UINavigationController to views other than the main view?

Thanks.

Answer 1

You are very close with your implementation. Try it in this order.

InfoViewController *infoView = [[InfoViewController alloc] initWithNibName:@"InfoViewController" bundle:nil];
UINavigationController *infoNavController = [[UINavigationController alloc] 
                                             initWithRootViewController:infoView];
[infoView release]; // skip this if using ARC
infoView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:infoNavController animated:YES]; 

UPDATE

To kill this modal, you will have to add your buttons to the main modal view.

InfoViewController.m

-(void)cancel:(id)sender {
   [self dismissModalViewControllerAnimated:YES];
}

-(void)viewDidLoad {
   [super viewDidLoad];

   UIBarButtonItem *cancelButton =
    [[UIBarButtonItem alloc] initWithTitle: @"Cancel"
                                     style: UIBarButtonItemStylePlain
                                    target: self
                                    action: @selector(cancel:)];
    self.navigationItem.leftBarButtonItem = cancelButton;
    [cancelButton release];
}