facebook log in - ios

Question

I'm working on integrating a facebook connect to my application and I have 2 problems:
1.
LBLoginViewController is the view that presents as the app launches.
I want to use the storyboard to put some ui elements but for some reason that I don't understand I cannot do that manually, only in code. How can I use the custom class LBLoginViewController?
2.
after the log in success I manage to load a view controller. I wont to load a UITabBarController but the method I'm using cannot do that. Which method can I use to do so?
this is the code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
// the view controller that load after log in
ListOfJobs *rootViewController =
[[ListOfJobs alloc] init];
UINavigationController *navController =
[[UINavigationController alloc]initWithRootViewController:rootViewController];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
// if the user logs in, do nothing - the root view is already up
if (FBSession.activeSession.state
== FBSessionStateCreatedTokenLoaded) {
NSLog(#"User Logged In");
}
//create and present the login view controller
else {
LBLoginViewController *loginViewController =
[[LBLoginViewController alloc] init];
[rootViewController presentViewController:
loginViewController animated:NO completion:nil];
}
return YES;
}

Answer 1

You should be able to add a UIViewController to your storyboard and then set its class to LBLoginViewController using the identity inspector.

Answer 2

What I think you should do for 2 is to assign your TabBarController as your root view controller
self.window.rootViewController = self.tabBarController;
and open LBLoginViewController as a modal view at the end of didFinishLaunchingWithOptions.
You can always check first if your user has already authorized your app with something like this:
if (FBSession.activeSession.state == FBSessionStateCreatedTokenLoaded) {
[FBSession openActiveSessionWithReadPermissions:permissions
allowLoginUI:YES
completionHandler:
^(FBSession *session,
FBSessionState state, NSError *error) {
[self sessionStateChanged:session state:state error:error];
}];
} else {
//open login view
}