FBSDK Login Error Code: 308 in Objective-C

The solution below works for iOS9 + running on Xcode 8, for Swift3.0

The steps are

1. Setup Facebook Launch

FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

2. Setup Open Url

   guard let source = options[UIApplicationOpenURLOptionsSourceApplicationKey] as? String else { return false }
let annotation = options[UIApplicationOpenURLOptionsAnnotationKey] as? String
return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: source, annotation: annotation)

3. Fix Keychain permission issue as shown in the image below