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

For swift 5 Xcode 10.3 (Latest google signin)

@available(iOS 9.0, *)
    func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any]) -> Bool {
        let googleDidHandle = GIDSignIn.sharedInstance().handle(url)

        return googleDidHandle
    }

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

        return googleDidHandle
    }

To open signIn screen on Button click

@IBAction func btnGoogleSigninClick(_ sender: AnyObject) {
        GIDSignIn.sharedInstance()?.presentingViewController = self
        GIDSignIn.sharedInstance()?.restorePreviousSignIn()

        GIDSignIn.sharedInstance().signIn()
    }

Answer 2

Xcode 8 Swift 3

If you are using multiple URL Schemes along with Google Sign In, use it like this:

func application(_ app: UIApplication,
                 open url: URL,
                 options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {

    if(url.scheme!.isEqual("fbXXXXXXXXXXX")) {
        return SDKApplicationDelegate.shared.application(app, open: url, options: options)

    } else {
        return GIDSignIn.sharedInstance().handle(url as URL!,
                                    sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String!,
                                    annotation: options[UIApplicationOpenURLOptionsKey.annotation])
    }
}

Answer 3

Try to perform any operations at function "signIn" in AppDelegate.

After Google sends you some data:

func signIn(signIn: GIDSignIn!, didSignInForUser user: GIDGoogleUser!,
            withError error: NSError!) {

    if (error == nil) {
        // Perform any operations on signed in user here.
        let userId = user.userID
        // Perform some operation to change the scene.
        // ........

    }
    else {
        print("\(error.localizedDescription)")
    }
}

Maybe the code below can give you some idea:

let myStoryBoard:UIStoryboard = UIStoryboard(name:"Main", bundle:nil)

let protectedPage = myStoryBoard.instantiateViewControllerWithIdentifier("ProtectedPageViewController") as! ProtectedPageViewController

let protectedPageNav = UINavigationController(rootViewController: protectedPage)

let appDelegate:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate

appDelegate.window?.rootViewController = protectedPageNav

??? I reference from YouTube's video "Sign-in with Google Account button. Example in Swift. Video 2", that are provided from "Sergey Kargopolov".

and...

I have a question similar to this and didn't solve it...

Good luck! :)

Answer 4

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
}

Answer 5

While n.by.n answer is okay I saw a better answer in another thread (Swift 2.3):

if GIDSignIn.sharedInstance().handle(url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String, annotation: options[UIApplicationOpenURLOptionsKey.annotation]) {
    return true
} else if something else {
    return true
} else {
    return false 
}