How to add/connect NIB to programmatically created UINavigationController? - ios

Question

First of all, I'm a beginner, so I might have my concepts wrong.
This is my code in AppDelegate.m:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIViewController *viewController = [[UIViewController alloc] initWithNibName:#"FirstView" bundle:nil];
self.navigationController = [[UINavigationController alloc] initWithRootViewController: viewController];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
The idea is to programmatically add UINavigationController, but then use a .xib (the "FirstView" paremeter) for the views. I have no problem with programmatically creating the views as well, but for simpler interfaces, I assume using IB can be done as well.
However, when I run the code, I get this error:
2013-07-11 21:20:42.644 new-book-proto-01[64308:11303] *** Terminating app due
to uncaught exception 'NSInternalInconsistencyException', reason:
'-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "FirstView" nib
but the view outlet was not set.'
What should I do? Is there anything missing?
Additionally, is something like this common in iOS development? Is it bad practice? Is there a better way to do this?

Answer 1

This is the reason as told: "reason:
'-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "FirstView" nib
but the view outlet was not set.' "
It means that you try to access or get value for some views (UI elements) that has not IBOutlet in your controller class or you have none view at all
You should create IBOutlets (properties) for each view (each UI element is view) that you would like to "see" in your controller