Facebook SDK login never calls back my application on iOS 9

Question

I\'ve followed this guide to update my application to use Facebook SDK 4.6 to work properly when built with the iOS 9 SDK.

When I tap the login button now, a Safari

Answer 1

For total swift newbies like myself, the problem was an alternate implementation of the application() method:

Working version:

 func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
    return FBSDKApplicationDelegate.sharedInstance().application(
        application,
        open: url,
        sourceApplication: sourceApplication,
        annotation: annotation)
}

Non working version (Copied from somewhere )

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