Firebase Auth Google - 总是要求提供帐户

Question

我最近实现了一个谷歌登录。它工作正常，但有一件事情困扰着我。

当用户第一次登录时，会打开一个窗口供用户登录google并选择他的帐户。 但是当用户注销并再次尝试通过 google 登录时，不知何故他之前的登录信息被记住了，而他刚刚登录。

每次用户选择通过谷歌登录时，如何实现要求谷歌登录？

这就是我注销用户的方式：

 try! Auth.auth().signOut()

登录：

func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error?) {
    if let error = error {
        print("Failed logging into Google: ", error)
        return
    }

    print("Successfully logged into Google.")

    guard let authentication = user.authentication else { return }
    let credential = GoogleAuthProvider.credential(withIDToken: authentication.idToken,
                                                   accessToken: authentication.accessToken)

    Auth.auth().signIn(with: credential) { (acc, error) in
        if let error = error {
            print("Failed to create User with Google: ", error)
            return
        }

        let databaseRef = Database.database().reference()
        guard let uid = Auth.auth().currentUser?.uid else { return }
        databaseRef.child("users").observeSingleEvent(of: .value, with: { (snapshot) in

            if snapshot.hasChild("\(uid)") {
                print("Data found.")
                let storyboard = UIStoryboard(name: "Main", bundle: nil)
                let vc = storyboard.instantiateViewController(withIdentifier: "ProfileViewController") as! ProfileViewController
                vc.readLeasing()
                vc.readData()
            } else {
                self.upDataToDatabase(from: user)
            }

        })

        let defaults = UserDefaults.standard

        logInViaGoogle = true
        defaults.set(logInViaGoogle, forKey: "logInViaGoogle")

        print("Successfully created user with Google.")
    }
}

Answer 1

正如在Firebase google auth 中自动选择用户一样。 如何强制它选择帐户

你可以做

var provider = new firebase.auth.GoogleAuthProvider();
provider.setCustomParameters({
prompt: 'select_account'
});