grocery viewController

class ViewController: UIViewController, PFLogInViewControllerDelegate, PFSignUpViewControllerDelegate{

    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        if (PFUser.currentUser() == nil) {
            let loginViewController = LoginViewController()
            loginViewController.delegate = self
            loginViewController.facebookPermissions = ["public_profile", "email", "user_friends", "user_education_history", "user_birthday"]
            loginViewController.signUpController?.delegate = self
            loginViewController.fields = [PFLogInFields.Facebook, PFLogInFields.Default]

            self.presentViewController(loginViewController, animated: false, completion: nil)
        }
        else {
            getFBUserInfo(PFUser.currentUser()!)
        }
    }