Firebase Twitter Authentication swiftUI, while user cancelling authentication current view is closed

问题

In my application I'm having google, facebook, twitter login. all these three logins are working well.

But for twitter login I am facing an issue that, Once I click the twitter login custom button, OAuthProvider opens the twitter authentication page. I cancelling the authentication then it came back to the app and within a second NavigationView pops back automatically. LoginView closed and the ContentView appears(Launch view).

I followed these simple steps for twitter login given by firebase

  var provider = OAuthProvider(providerID: "twitter.com")

func twitterLogin(){
provider.getCredentialWith(nil) { credential, error in
      if error != nil {
        // Handle error.
        print(error ?? "error")

      }
      if credential != nil {
        Auth.auth().signIn(with: credential!) { authResult, error in
          if error != nil {
            // Handle error.
          }
          else{
            self.twitterLoginSuccess = true
            print("Twitter login success")
          }
          // User is signed in.
          // IdP data available in authResult.additionalUserInfo.profile.
          // Twitter OAuth access token can also be retrieved by:
          // authResult.credential.accessToken
          // Twitter OAuth ID token can be retrieved by calling:
          // authResult.credential.idToken
          // Twitter OAuth secret can be retrieved by calling:
          // authResult.credential.secret
        }
      }
    }

}

Button action from login view

  Button(action: self.viewModel.twitterLogin){
                        SignInButton(imageName: "twitter", text: "Sign in with twitter")
                    }.frame(height: 50).buttonStyle(ButtonStyleSignIn())

Launch view code

struct ContentView: View {

@State var show = false
@EnvironmentObject var viewModel : LoginViewModel // (/1)

var body: some View {
    NavigationView{
        ZStack
        {
            Color("colorPrimaryDark")
                .edgesIgnoringSafeArea(.all)
        VStack{
            NavigationLink(destination: LoginView().environmentObject(viewModel), isActive: $show, label: {
                Image("main_logo").renderingMode(.original).frame(width: 100, height: 100)
            })
        }  .navigationBarHidden(true)
            .navigationBarTitle(Text("Home"))
            .edgesIgnoringSafeArea([.top, .bottom])
        }
    }//.preferredColorScheme(.dark) // white tint on status bar
    .onAppear {
        DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
            self.show.toggle()
        }
    }
}

}

Here I have added the LoginView Code

import SwiftUI
import Firebase
import FirebaseAuth
import FBSDKCoreKit
import FBSDKLoginKit
struct LoginView: View {
    @EnvironmentObject var viewModel : LoginViewModel // (/1)
    @State var show = true
    
    var body: some View {
        ZStack
        {
            Color("colorPrimaryDark")
                .edgesIgnoringSafeArea(.all)
            if self.viewModel.loginSuccess {
                NavigationLink(destination: fromLoginNavigationTo(), isActive: self.$show, label: {
                    EmptyView()
                })
            }
            VStack {
                HStack {
                    Spacer()
                    
                    Button(action: {
                        self.viewModel.signInAnonymously()
                    }){
                        
                        TextViewBody(text: "Skip").padding()
                    }
                    
                }
                    VStack {
                        Button(action: self.viewModel.twitterLogin){
                            SignInButton(imageName: "twitter", text: "Sign in with twitter")
                        }.frame(height: 50).buttonStyle(ButtonStyleSignIn())

                }.padding(.init(top: 0,  leading: 32,bottom: 0,  trailing: 32))
                .navigationBarHidden(true)
                .navigationBarTitle(Text("Home"))
                .edgesIgnoringSafeArea([.top, .bottom])
            }
        }//.preferredColorScheme(.dark) // white tint on status bar
        
    }
}

Xcode : 12 beta

Device : Simulator iOS 14

来源：https://stackoverflow.com/questions/62816501/firebase-twitter-authentication-swiftui-while-user-cancelling-authentication-cu

标签

swift

firebase

twitter

swiftui