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

The AppDelegate was missing:

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

Answer 2

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)
}

Answer 3

Here's my situation: I could use myapp to login with fb. Then when I close the app (back to home screen) and enter the app again, it presents me a blank screen. And I solved it by these:

In the app delegate:

func applicationDidBecomeActive(application: UIApplication) {
    FBSDKAppEvents.activateApp()
}

Also, I'm using the bridging file from this article: http://www.brianjcoleman.com/tutorial-how-to-use-login-in-facebook-sdk-4-0-for-swift/

The bridging file looks like this:

#ifndef Bridging_Header_h
#define Bridging_Header_h

#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>

#endif /* Bridging_Header_h */