navController for first launch view - ios

Question

I currently have a launch screen storyboard with an image set up as my loading screen.
I'm used to doing everything programmatically, and storyboarding is throwing me for a ride. I have a boolean set up to determine if this is the first time the app is being launched. If so, I want to have one view controller that I set as the root of my navigation controller. If it isn't the first launch, I want to set a different root view controller to my nav controller.
I've clicked and dragged a navigation controller onto my storyboard. I just don't know what to do with it now. I have a viewController set up with an image that I'd like to be the first thing seen if it is the first time the app is being launched. However, I'm not sure what is automatically initialized using storyboard, so conceptually I'm not sure how to set up my app.
Since I have to handle this condition programmatically, do I even need to create a nav controller in storyboard, or would that be redundant?
My parent VC (viewController) is just an image with a label overlaid on top. Building with the below code in my appDelegate.h file correctly shows my launch screen storyboard, but then fades to a black screen.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
firstLaunch = YES;
if (firstLaunch == YES) {
ViewController *launchScreen = [ViewController new];
UINavigationController * navControl = [[UINavigationController alloc]initWithRootViewController:launchScreen];
self.window.rootViewController = navControl;
firstLaunch = NO;
}
else {
// create instance of other view controller and set as root of navigation controller
}
return YES;
}
Any ideas as to why my app is just navigating to a black screen?

Answer 1

Make sure to use
[window makeKeyAndVisible];
I usually do this in my application like so:
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.navController = [[UINavigationController alloc]init];
self.window.rootViewController = self.mainViewController;
[self.window makeKeyAndVisible];
In addition, your code will always say it's the user's first time. I would recommend using NSUserDefaults as such:
BOOL hasLaunchedBefore = [[NSUserDefaults standardUserDefaults] boolForKey:#"HasLaunchedBefore"];
if (!hasLaunchedBefore) {
//All your first launch UI stuff
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:#"HasLaunchedBefore"];
[[NSUserDefaults standardUserDefaults] synchronize];
} else {
//Not first launch
}