Ios 谷歌didSignInForUser没有'；不要在swift 3中开火

我正在我的项目中进行谷歌登录。我使用CocoaPods安装了SDK。我以前也用Objective-C编写过这个应用程序。因此，我从我的旧项目中拖出了相同的Google配置文件（GoogleService Info.plist）

我跟着。但当我按下“登录”按钮时，我指向谷歌网页，输入用户名密码后，它会返回到我的应用程序。但是这个委托不会触发

func signIn(signIn: GIDSignIn!, didSignInForUser user: GIDGoogleUser!, withError error: NSError!) {
    if error == nil {
        // Perform any operations on signed in user here.
        let userId = user.userID                  // For client-side use only!
        let idToken = user.authentication.idToken // Safe to send to the server
        let fullName = user.profile.name
        let givenName = user.profile.givenName
        let familyName = user.profile.familyName
        let email = user.profile.email
        let dm = Datamanager.sharedInstance
        dm.gplusEmail = email
        NotificationCenter.default.post(name: NSNotification.Name(rawValue: "RETURNED_GOOGLE"), object: nil)
        // ...
    } else {
        print("\(error.localizedDescription)")
    }
}

我的登录按钮是一个

ui按钮

，在我的ViewController中，我以这种方式实现了：

@IBAction func googleClick(_ sender: UIButton) {
    strLoggedWay="google"
    GIDSignIn.sharedInstance().signIn()
}

请帮帮我。我的代码处理有什么问题

//In your login view controller

@IBAction func googleClick(_ sender: UIButton) {

    strLoggedWay="google"

    GIDSignIn.sharedInstance().clientID = //getGoogleClientId
    GIDSignIn.sharedInstance().serverClientID = //getGoogleServerClientId
    GIDSignIn.sharedInstance().uiDelegate = self
    GIDSignIn.sharedInstance().delegate = self
    GIDSignIn.sharedInstance().scopes = @["https://www.googleapis.com/auth/userinfo.profile","https://www.googleapis.com/auth/userinfo.email"]
    GIDSignIn.sharedInstance().signIn()
}

func signIn(signIn: GIDSignIn!, didSignInForUser user: GIDGoogleUser!,
            withError error: NSError!) {
    if (error == nil) {
        // Perform any operations on signed in user here.
        let userId = user.userID                  // For client-side use only!
        let idToken = user.authentication.idToken // Safe to send to the server
        let fullName = user.profile.name
        let givenName = user.profile.givenName
        let familyName = user.profile.familyName
        let email = user.profile.email
        let dm=Datamanager.sharedInstance
        dm.gplusEmail=email
        NotificationCenter.default.post(name: NSNotification.Name(rawValue: "RETURNED_GOOGLE"), object: nil)
        // ...
    } else {
        print("\(error.localizedDescription)")
    }
}