Question

I’m trying to implement a basic UINavigationController and I’m running into an issue with the navigation controller displaying a wrong view.

I started by creating a Window Based Application in Xcode 4 that gave me the following files:spellingAppDelegate.h, spellingAppDelegate.m and MainWindows.xib. I then added a new UIViewController subclass and call it gameViewController.

The following is my code for myAppDelegate.h

#import <UIKit/UIKit.h>

@interface spellingAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    UINavigationController *navigationController;
}


@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) UINavigationController *navigationController;

@end

the following is my myAppDelegate.m

#import "spellingAppDelegate.h"
#import "gameViewController.h"
#import "resultViewController.h"

@implementation spellingAppDelegate

@synthesize window = window;
@synthesize navigationController = navigationController;


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self.window makeKeyAndVisible];

    // create the MyView controller instance:
    gameViewController *controller = [[gameViewController alloc] initWithNibName:@"gameViewController" bundle:nil];

    // set the title that appears in the navigation bar:
    [controller.navigationItem setTitle:@"Main View"];

    // create the Navigation Controller instance:
    UINavigationController *newnav = [[UINavigationController alloc] initWithRootViewController:controller];

    // set the navController property:
    [self setNavigationController:newnav];

    // release both controllers:
    [newnav release];
    [controller release];

    // add the Navigation Controller's view to the window:
    [window addSubview:[navigationController view]];

    return YES;
}

I was under the impression that if i run the above code, the app will start with gameViewController.xib. However, its displaying MainWindow.xib. I know I’m probably miss something basic but I can’t figure out what I did wrong. Thank you.

Answer 1

Try this it will work

    navigationController = [[UINavigationController alloc] initWithRootViewController:controller];
   [self.window addSubview:navigationController.view];
   [self.window makeKeyAndVisible];