navigationbar title not getting set iphone

In my app, I'm presenting a modalviewcontroller as follows and I'm not able to change the navigationbar's title or any of its properties for that matter.

fullListTopCompanies *fullListTopCompaniesInstance = [[fullListTopCompanies alloc] initWithNibName:@"fullListTopCompanies" bundle:nil];

UINavigationController *cntrol = [[UINavigationController alloc] initWithRootViewController:fullListTopCompaniesInstance];

[fullListTopCompaniesInstance setTitle:@"TEST"];


UIBarButtonItem *submit = [[UIBarButtonItem alloc]
                           initWithBarButtonSystemItem:UIBarButtonSystemItemDone
                           target:self
                        开发者_JAVA百科   action:@selector(displayViewForPosts)];
fullListTopCompaniesInstance.navigationItem.rightBarButtonItem = submit;
[submit release];


[self presentModalViewController:cntrol animated:YES];
[cntrol release];

I tried instantiating application delegate and assigning its navigationcontroller to local navigationcontroller instance but no use.

Somehow that navigationcontroller is not accessible. It can't be accessed by using "self.navigationitem". Whenever I present modalviewcontroller with the navigationcontroller, this navigation comes below the actual navigationcontroller.

For Example, if you are trying to set title of navigation bar for the ViewController called "ABCViewController", then add

self.Title = @"";

in viewWillAppear Method of the ABCViewController and try to rebuild and Run.

Hope this helps. :)

Whenever I present modalviewcontroller with the navigationcontroller, this navigation comes below the actual navigationcontroller.

That problem is because calling presentModalViewController: on self, you should call it on self.navigationController that way the navigation controller won't be shown below the other one.

As to why you can't set the navigationController's properties, I don't know. It looks Ok to me. But I expect it is because you are setting the properties before viewDidLoad is called by the nib-loader. I think I remember having problems like this myself a long time ago.

You should set the title etc. in the UIViewController subclass's viewDidLoad method and I think you worries will be over.

I've created a simple view based app with xcode template, then i've added your code and it's working for me...

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

// Override point for customization after application launch.

// Add the view controller's view to the window and display.

TestViewController *fullListTopCompaniesInstance = [[TestViewController alloc] initWithNibName:@"TestViewController" bundle:nil];

UINavigationController *cntrol = [[UINavigationController alloc] initWithRootViewController:fullListTopCompaniesInstance];

[fullListTopCompaniesInstance setTitle:@"TEST"];


UIBarButtonItem *submit = [[UIBarButtonItem alloc]
                           initWithBarButtonSystemItem:UIBarButtonSystemItemDone
                           target:self
                           action:@selector(displayViewForPosts)];
fullListTopCompaniesInstance.navigationItem.rightBarButtonItem = submit;

[window addSubview:viewController.view];
[window makeKeyAndVisible];

[viewController presentModalViewController:cntrol animated:YES];

[cntrol release];
[submit release];

return YES;

}