iOS tab bar not show modal view - iphone

Question

I want to show modal view in the start of the app but it doesn't appear. This is my code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self initDataBase];
CustomerModel *customer = [[[CustomerPersistor alloc] init] getLoggedCustomer];
self.window.rootViewController = self.tabBarController;
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
UIViewController *profileViewController = [[[ProfileViewController alloc] initWithNibName:#"ProfileViewController" bundle:nil] autorelease];
profileViewController.title = #"Profile";
UINavigationController *profileNavigation = [[[UINavigationController alloc] initWithRootViewController:profileViewController] autorelease];
self.tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:profileNavigation, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
if(customer == nil) { NSLog(#"HO");
ViewController *login = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
//login.delegate = self.tabBarController.view;
[self.viewController presentModalViewController:[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil] animated:YES];
}
return YES;
}
How can I fix it?

Answer 1

First, there doesn't appear to be a self.viewController property that is set, and you're instantiating the same "ViewController" twice. This is all wrong:
ViewController *login = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
//login.delegate = self.tabBarController.view;
[self.viewController presentModalViewController:[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil] animated:YES];
Try moving this code to your viewDidLoad of your profileViewController...i.e. let the TabBarController load along with its first tab's view controller.

Answer 2

Initiate an instanse from the model view like this:
modelView = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
Please follow the list below:
Set the viewController model presented style
[modelView setModalPresentationStyle:UIModalPresentationPageSheet];
Then present it using:
[self.viewController presentModalViewController:floorView animated:YES];
Then, set the size and location of the model controller like this:
modelView.view.superview.bounds = CGRectMake(0, 0, 700, 550);//it's important to do this after presentModalViewController
modelView.view.superview.center = self.view.superview.center;//self.view assumes the base view is doing the launching, if not you might need self.view.superview.center etc.
Hope this help you.