Issues in UINavigationController in Xcode 4.3.2? - iphone

Question

I am working in iPhone application, Using XCode 4.3.2 tool develop my application (not using story board). When I press a button from homescreen.m to navigate to Login screen, then I run the app, cannot navigate from home to login screen, how to fix this issue?
I tried this:
Class Name - Appdelegate.m
- (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.window makeKeyAndVisible];
home = [[HomeScreen alloc]init];
UINavigationController *navi =[[UINavigationController alloc]initWithRootViewController:home];
[self.window addSubview:navi.view];
return YES;
}
Class Name - HomeScreen.m
#import "HomeScreen.h"
#import "LoginScreen.h"
#interface HomeScreen ()
#end
#implementation HomeScreen
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.title=#"HomeScreen";
UIButton *Button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
Button1.frame = CGRectMake(10, 100, 100, 50);
[Button1 setTitle:#"Homescreen" forState:UIControlStateNormal];
[Button1 addTarget:self action:#selector(GotONext) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:Button1];
// Do any additional setup after loading the view.
}
-(void)GotONext
{
LoginScreen *log =[[LoginScreen alloc]init];
[self.navigationController pushViewController:log animated:YES];
}
Class Name - LoginScreen.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.title=#"LoginScreen";
}

Answer 1

try bellow code...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
home = [[[HomeScreen alloc] initWithNibName:#"HomeScreen" bundle:nil] autorelease];
UINavigationController *navviewController1=[[UINavigationController alloc]initWithRootViewController: HomeScreen];
self.window.rootViewController = navviewController1;
return YES;
}
and on next button method use bellow code...
-(void)GotONext
{
LoginScreen *log =[[LoginScreen alloc]initWithNibName:#"LoginScreen" bundle:nil] autorelease];
[self.navigationController pushViewController:log animated:YES];
}
i hope this help you...
:)

Answer 2

I think you are forgot this thing to write initwithNibName:#"LogonScreen".
-(void)GotONext
{
LoginScreen *log =[[LoginScreen alloc] initWithNibName:#"LoginScreen" bundle:nil];
[self.navigationController pushViewController:log animated:YES];
}