Trouble handling Google sign in Swift 3

Question

I am new to iOS and am having trouble with app delegate URL handling in Swift 3, and I could really use some pointers.

The below code works perfectly fine in Swift 2

Answer 1

Swift 4, Xcode 9

If you are using multiple URLSchemes for facebook and Google SignIn:

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
   let fbSignIn     = FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
   let googleSignIn = GIDSignIn.sharedInstance().handle(url, sourceApplication: sourceApplication, annotation: annotation)

   return fbSignIn || googleSignIn
}