Programmatically creating UINavigationController in iOS

Question

I am new to iOS. And I want to use navigation controller in my application but I have no any idea how to do it. So can any one guide me step by step for creating navigation in my application.

Answer 1

In appDelegate.h

@property (strong, nonatomic) UINavigationController *navController;

and set the delegate UINavigationControllerDelegate and synthesise object in appDelegate.m now,

appDelegate.m

you can set navigation controller in didFinishLaunchingWithOptions method

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    frstVwCntlr = [[firstViewController alloc] initWithNibName:@"firstViewController" bundle:nil];
    self.navController = [[UINavigationController alloc] initWithRootViewController:self.frstVwCntlr];
    self.window.rootViewController = self.navController;
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

In the above code , your firstViewController is set to UINavigationController and UINavigationController added to UIWindow like

self.window.rootViewController = self.navController

Hope this may help you