Facebook login - stays at white web page SWIFT

Question

In my LoginViewController, I implemented the FBSDKLoginButtonDelegate and imported the FBSDKLoginKit & FBSDKCoreKit. My code in viewDidLoad is as appears:

Answer 1

As stated above missing app delegate but in two places.

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
}

and

func application(application: UIApplication,
    openURL url: NSURL,
    sourceApplication: String?,
    annotation: AnyObject) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(
            application,
            openURL: url,
            sourceApplication: sourceApplication,
            annotation: annotation)
}