UINavigationController: Simplest Example

Question

I\'m trying to do very simple example of a UINavigationController. Here is my code:

- (void)viewDidLoad {
  [super viewDidLoad];

This next

Answer 1

I'm just restating @E-ploko's answer, which is 100% correct (which is why I marked it best answer).

You need more views (and view controllers) to use the UINavigationController. One of them houses the UINavigationController, and its rootViewController is the first page of the series (the one that has no "back").

I got rid of the external dependencies for the code sample: obviously this is monolithic sample code, not monolithic real code.

- (void)viewDidLoad {
    [super viewDidLoad];

    UIViewController *one = [[UIViewController alloc] init];

    [one.view setBackgroundColor:[UIColor yellowColor]];
    [one setTitle:@"One"];

    navController = [[UINavigationController alloc] initWithRootViewController:one];
    // here 's the key to the whole thing: we're adding the navController's view to the 
    // self.view, NOT the one.view! So one would be the home page of the app (or something)
    [self.view addSubview:navController.view];

    // one gets reassigned. Not my clearest example ;)
    one = [[UIViewController alloc] init];

    [one.view setBackgroundColor:[UIColor blueColor]];
    [one setTitle:@"Two"];

    // subsequent views get pushed, pulled, prodded, etc.
    [navController pushViewController:one animated:YES];
}