IOS FaceBook login with Parse

fbLogin.swift

    // MARK: - Login Button Pressed
    @IBAction func loginButtonPressed(sender: AnyObject) {
        MBProgressHUD.showHUDAddedTo(self.view, animated: true)
        let permissions = ["user_about_me", "public_profile", "email", "user_relationships", "user_birthday", "user_location"]
        PFFacebookUtils.logInWithPermissions(permissions, { (user: PFUser!, error: NSError!) -> Void in
            if user == nil {
                if (error == nil) {
                    println("User cancelled FB login")
                }else{
                    println("FB login error: \(error)")
                }
            } else if user.isNew {
                NSLog("User signed up and logged in through Facebook!")
                self.getUserDetails(user)
                
            } else {
                NSLog("User logged in through Facebook!")
                self.getUserDetails(user)
            }
            MBProgressHUD.hideHUDForView(self.view, animated: true)
        })
    }
    
    
    
    
    
    func getUserDetails(user: PFUser) {
        MBProgressHUD.showHUDAddedTo(self.view, animated: true)
        var fbRequest = FBRequest.requestForMe()
        fbRequest.startWithCompletionHandler { (connection: FBRequestConnection!, result:AnyObject!, error: NSError!) -> Void in
            if error == nil {
                var userData = result as NSDictionary
                
                if let fbId = userData.objectForKey("id") as? String {
                    user["fbId"] = fbId
                }
                
                var f_name = ""
                var l_name = ""
                
                if let fname = userData.objectForKey("first_name") as? String {
                    f_name = fname
                }
                if let lname = userData.objectForKey("last_name") as? String {
                    l_name = lname
                }
                
                user["first_name"] = f_name
                user["last_name"] = l_name
                user["full_name"] = "\(f_name) \(l_name)"
                
                if let email = userData.objectForKey("email") as? String {
                    user["email"] = email
                }
                
                if let gender = userData.objectForKey("gender") as? String {
                    user["gender"] = gender
                }
                
                if let verified = userData.objectForKey("verified") as? Bool {
                    user["fb_verified"] = verified
                }
                
                
                if let location: AnyObject = userData.objectForKey("location")? {
                    if let locationName = location.objectForKey("name") as? String {
                        user["location"] = locationName
                    }
                }
                
                // birthday
                
                if let birthday = userData.objectForKey("birthday") as? String {
//                    if !birthday.isEmpty {
                        var dateFormatter = NSDateFormatter()
                        dateFormatter.dateFormat = "MM/dd/yyyy"
                        var birthdayDate = dateFormatter.dateFromString(birthday)
                        user["birthday"] = birthdayDate!
                        user["age"] = self.getAge(birthdayDate!)
//                    }
                }
                
                user.saveInBackgroundWithBlock({ (success: Bool, error: NSError!) -> Void in
                    if error == nil {
                        // continue to phone view if its empty
                        if (user["phone"] == nil) || ((user["phone"] as String).isEmpty) {
                            let phoneView: PhoneNumberViewController = PhoneNumberViewController()
                            self.navigationController?.pushViewController(phoneView, animated: true)
                        } else {
                            self.navigationController?.dismissViewControllerAnimated(true, completion: { () -> Void in
                                //
                            })
                        }
                    } else {
                        // show error
                    }
                    MBProgressHUD.hideHUDForView(self.view, animated: true)
                })
                
                
            } else {
                println("Error: \(error.userInfo)")
                MBProgressHUD.hideHUDForView(self.view, animated: true)
            }
        }
    }