Connect together: AppDelegate, ViewController and XIB

I am new to the iOS programming and got stuck with one problem. What was done: I have created iOS application. Initially it had main.m, AppDelegate.h, AppDelegate.m and some other supporting files (not with code) that are usually created. Then I manually created XIB file with interface (LoginView.xib) and manually added LoginViewController.h and LoginViewController.m to control XIB. Added outlets to LoginViewController.h. After all I set up file's owner class (LoginViewController) and made connections between XIB and LoginViewController.h. Problem description: I need to show instantiate login view controller and show login view immediately at the application's start. I tried several attempts and read a dozen of forum threads, but no way. Nothing is shown except white window background. How can I do it correct? Reference code: LoginViewController.h ``` #import <UIKit/UIKit.h> @interface LoginViewController : UIViewController { IBOutlet UIView *_loginView; IBOutlet UITextField *_tfLogin; IBOutlet UITextField *_tfPassword; IBOutlet UIButton *_btnLoginToSystem; } - (IBAction)attemptLogin:(id)sender; @end ``` LoginViewController.m ``` #import "LoginViewController.h" @interface LoginViewController () @end @implementation LoginViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)attemptLogin:(id)sender { } @end ``` AppDelegate.h ``` #import <UIKit/UIKit.h> #import "LoginViewController.h" @interface AppDelegate : UIResponder <UIApplicationDelegate> @property (strong, nonatomic) UIWindow *window; @property (strong, nonatomic) LoginViewController *loginViewController; @end ``` AppDelegate.m ``` #import "AppDelegate.h" @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // Override point for customization after application launch. self.window.backgroundColor = [UIColor whiteColor]; self.loginViewController = [[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil]; [self.window.rootViewController presentModalViewController:self.loginViewController animated:NO]; [self.window makeKeyAndVisible]; return YES; } ``` UPDATE!!! Guys, thanks to you all I've found another issue. Once I got your approve that my code (after appropriate edition, of course) is correct, I started simulator and saw that my app crashes with the following exception: ``` NSInternalInconsistencyException with the reason [UIViewController _loadViewFromNibNamed:bundle:] loaded the ... nib but the view outlet was not set. ``` Thanks to StackOverflow I fixed it. Loaded nib but the view outlet was not set - new to InterfaceBuilder Quotation of Josh Justice comment from the topic I provided link to: - Open the XIB file causing problems - Click on file's owner icon on the left bar (top one, looks like a yellow outlined box) - If you don't see the right-hand sidebar, click on the third icon above "view" in your toolbar. This will show the right-hand sidebar - In the right-hand sidebar, click on the third tab--the one that looks a bit like a newspaper - Under "Custom Class" at the top, make sure Class is the name of the ViewController that should correspond to this view. If not, enter it - In the right-hand sidebar, click on the last tab--the one that looks like a circle with an arrow in it - You should see "outlets" with "view" under it. Drag the circle next to it over to the "view" icon on the left bar (bottom one, looks like a white square with a thick gray outline - Save the xib and re-run Probably this information aggregated into one point will help other newcomers to pass the way I passed faster.