Google 登录服务器验证码无 iOS？

我们让 Google 登录您的应用程序。我们在请求登录时提供服务器客户端 ID。

我们得到的 user.serverAuthCode 为 nil。

我们的要求如下：

func googleLogin(){
            var configureError: NSError?
            GGLContext.sharedInstance().configureWithError(&configureError)
            assert(configureError == nil, "Error configuring Google services: \(configureError)")

            let gid = GIDSignIn.sharedInstance()
            if let path = Bundle.main.path(forResource: "GoogleService-Info", ofType: "plist") {
                let myDict = NSDictionary(contentsOfFile: path)
                gid?.serverClientID = "our servers cliet id as configured over firebase"

// This client id of our ios app we are getting from
// GoogleService-info.plist 
                gid?.clientID = myDict!.value(forKey: "CLIENT_ID") as! String

            }
            //        gid?.serverClientID = "our_servers" // TODO: fetch from plist
            gid?.scopes.append("https://www.googleapis.com/auth/gmail.readonly")
            print("\nClient Id: \(gid!.clientID!) Server Client Id: \(gid!.serverClientID!)\n")
            gid?.delegate = self

        }

我们正在努力获得serverAuthCode如下 ：

func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!) {
        if (error == nil) {
            // Perform any operations on signed in user here.
            let auth = user.serverAuthCode
            print(auth)
            let fullName = user.profile.name
         } else {
            print("\(error.localizedDescription)")
        }

    }

But its serverAuthCode为 null 我们不确定可能出了什么问题。

问题是服务器验证码只会在用户第一次登录时发送。用户必须刚刚看到确认屏幕。在所有后续登录中，不会发送服务器验证代码。去https://security.google.com/settings/security/permissions https://security.google.com/settings/security/permissions并删除您的应用程序的凭据，然后您将获得服务器身份验证代码。