Parse - Bypass Login in AppDelegate

Question

I am working to bypass login screen if the current user is not nil. To do this, I followed the recommendation posted here. After running the code, I get a blank white view in the simulator without any errors showing. Here is the code:

 storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle());
        let currentUser = PFUser.currentUser()
        print(currentUser)
        if currentUser != nil {
            self.window?.rootViewController = storyboard?.instantiateViewControllerWithIdentifier("HomeViewController");
        }

Worth mentioning that HomeViewController is based on Tab navigation. What am I missing?

The setup I have is:

• App is launched and the first view is the Sign In view (with button for signup). This initial view is SignInViewController and I embedded a UINavigationController to it.
• User can login by providing credentials (if correct, segue is performed to redirect to HomeViewController)
• User can signup and follow the steps (multiple controllers). At the end they will be redirected to Home View Controller.

Answer 1

I'm assuming your home tab bar controller has the identifier "HomeViewController" and your sign in view controller has the identifier "SignInViewController" and this code is in your didFinishLaunchingWithOptions() AppDelegate method:

storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
if let currentUser = PFUser.currentUser() { // currentUser is not nil
    // set up app for valid in user
    self.window?.rootViewController = storyboard?.instantiateViewControllerWithIdentifier("HomeViewController")
    return true // don't load the rootViewController from your storyboard (if you have an initial view set)
} else { // there is no current user
    // set up app for new or non logged in user
    self.window?.rootViewController = storyboard?.instantiateViewControllerWithIdentifier("SignInViewController")
    return true
}

From your comments, it sounds like you have a navigation controller with its root view controller being your sign in view controller, which is why when you segue to your tab bar controller, you get a navigation bar.

Since with my approach you're not getting the segue (and the sign in view controller's navigation bar), initialize a new UINavigationController and set its rootViewController to be your tab bar controller:

if let currentUser = PFUser.currentUser() { // currentUser is not nil
    // load tab bar controller
    let tabBarController = storyboard?.instantiateViewControllerWithIdentifier("TabBarViewController")

    // initialize a new navigation controller with the tab bar controller as its rootViewController
    let navC = UINavigationController(rootViewController: tabBarController)

    // set the window's root view controller to be your new navigation controller
    self.window?.rootViewController = navC
}