I want to sign in to google according to the method found in this URL:

https://paulallies.medium.com/google-sign-in-swiftui-2909e01ea4ed

but the problem is that App delegate is not found in swiftui new project ? since the app delegate requires client ID implementation as shown in URL

any idea and thanks

CodePudding user response：

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()
               }
            }
            
    }
  
    
}

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