Google Signin Not Calling Delegate Method After Success

iOS: Google SignIn not working if delegate is not UIApplicationDelete

Ok, my bad. Of course after taking the time to post this I almost immediately found the problem.

Which had nothing to do with Google Sign In.

I'd accidentally set FirebaseSecurity as a transient instance in my I container so it was being dealloc'd before the logon button was pressed. Doh!

I'll leave the question here even though everything is working. Perhaps someone else will learn something from my mistake. :-)

iOS Google Signin SDK webview not closing after signin

Make sure you are setting your UI delegate like so –

[GIDSignIn sharedInstance].uiDelegate = self;

You also need to implement –

- (void)signIn:(GIDSignIn *)signIn
dismissViewController:(UIViewController *)viewController

Inside that function you need to dismiss the Google view controller by calling [self dismissViewControllerAnimated:YES completion:nil];

Cannot find type GIDSignInDelegate in scope

As pointed out by Chris in the comments, follow the migration guide to update to GoogleSignIn 6.x.

See also this example of migrating the Firebase Auth QuickStart.

how to sign in with google in swiftui when there is no app delegate file inside the project?

This is for everyone having problem with AppDelegate SwiftUI 3.0 new update

Add in app view

import Foundation
import SwiftUI
import Firebase
import GoogleSignIn

@main
struct YourApp: App {
    let persistenceController = PersistenceController.shared
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    var body: some Scene {
        WindowGroup {

         ContentView()

            
        }
    }
}
class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        FirebaseApp.configure()
        
        return true
    }
    @available(iOS 9.0, *)
    func application(_ application: UIApplication, open url: URL,
                     options: [UIApplication.OpenURLOptionsKey: Any])
      -> Bool {
      return GIDSignIn.sharedInstance.handle(url)
    }
    
}

Then in loginView add inside login struct

 @State var isLoading : Bool = false

func handleLogin(){
        // google sign in
        guard let clientID = FirebaseApp.app()?.options.clientID else { return }

        // Create Google Sign In configuration object.
        let config = GIDConfiguration(clientID: clientID)
        
        isLoading = true
        
        GIDSignIn.sharedInstance.signIn(with: config, presenting: getRootViewController()) { [self] user, error in
            if let error = error {
                isLoading = false
                print(error.localizedDescription)
              return
            }

            guard
              let authentication = user?.authentication,
              let idToken = authentication.idToken
            else {
             isLoading = false
              return
            }

            let credential = GoogleAuthProvider.credential(withIDToken: idToken, accessToken: authentication.accessToken)
            
            // Firebase Authentication
           Auth.auth().signIn(with: credential) {result, err in
               isLoading = false
                if let error = error {
                    print(error.localizedDescription)
                    return
                }
               //Displaying User Name...
               guard let user = result?.user else {
                   return
               }
               print(user.displayName ?? "Success" )
                //updating user as logged in
               withAnimation{
                   log_Status = true
// and this is where you want the user to go if successful
                   goHome()
               }
            }
            
    }
  
    
}

where goHome() function is

public func goHome() {
    if let window = UIApplication.shared.windows.first {
        window.rootViewController = UIHostingController(rootView: HomeView())
        window.makeKeyAndVisible()
    }
}

also add this to loginView but as extension

extension View{
    func getRect()->CGRect{
        return UIScreen.main.bounds
    }
        // retrieve RootView
    func getRootViewController()->UIViewController{
        guard let screen = UIApplication.shared.connectedScenes.first as? UIWindowScene else {
            return . init()
            
        }
        
        guard let root = screen.windows.first?.rootViewController else {
            return .init()
        }
        return root
    }
}

don't forget to give the button the handleLogin()

   Button(action: {handleLogin()}) {
                            Image("Gmail")
                        }
                        .padding()
                        .foregroundColor(.white)
                        .background(Color.white)
                        .cornerRadius(.infinity)

and you are good to go my friends /p>

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