Have your encounter this issue, the UInavigationController is not showing.. here's my code.. 

```
eSigHomeViewController *controller = [[eSigHomeViewController alloc] initWithNibName:@"eSigHomeViewController" bundle:[NSBundle mainBundle]];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:controller];
self.navigationController.navigationBarHidden = YES;
self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

// Override point for customization after application launch.
[self.window addSubview:self.navigationController.view];
self.window.backgroundColor = [UIColor clearColor];
[self.window makeKeyAndVisible];

```

Do, i missed something.. Hope you can provide some assistance.. 

Thanks, 

Nestea