如何在经过身份验证后退出Google

Question

因此,我的应用可以选择使用Google登录.单击Google提供的按钮后,将打开Web视图并让用户输入其凭据.在允许应用访问他们的信息后,应用程序然后签署用户并将SignInViewController更改为TabBarController(他们现在可以相应地进行交互).

当用户按下"注销"按钮时,他们会按照预期被定向到登录屏幕.但奇怪的是,如果用户再次按下谷歌按钮,他们会自动登录,根本没有进一步的身份验证,也没有选择删除他们的帐户.他们是否有办法清除谷歌帐户凭据以保护用户免遭意外盗窃？

登录功能:

func signIn(signIn: GIDSignIn!, didSignInForUser user: GIDGoogleUser!, withError error: NSError!) {
    if let error = error {
        print(error.localizedDescription)
        return
    }
    let authentication = user.authentication
    let credential = FIRGoogleAuthProvider.credentialWithIDToken(authentication.idToken, accessToken: authentication.accessToken)
    FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
        // ...
        SignInViewController().signedIn(user)
    }
    // ...
}

退出功能:

func signOutOverride() {
    do {
        try! FIRAuth.auth()!.signOut()
        CredentialState.sharedInstance.signedIn = false
        // Set the view to the login screen after signing out
        let storyboard = UIStoryboard(name: "SignIn", bundle: nil)
        let loginVC = storyboard.instantiateViewControllerWithIdentifier("SignInVC") as! SignInViewController
        let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
        appDelegate.window?.rootViewController = loginVC
    } catch let signOutError as NSError {
        print ("Error signing out: \(signOutError)")
    }
}

Answer 1

迅速

尝试 GIDSignIn.sharedInstance().signOut()

目标 - c

[[GIDSignIn sharedInstance] signOut];

Answer 2

是的,就像@Rahul所说,下面的代码将是正确的方式.

GIDSignIn.sharedInstance().signOut()

https://developers.google.com/identity/sign-in/ios/sign-in?ver=swift#sign_out_the_user