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

试试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

Answer 3

在使用GoogleSignIn SDK之后，想要详细说明以前的答案。

我看到了signOut()和disconnect()的方法，并想知道差异是什么。

signOut()是一个同步电话：

// Immediately sets GIDSignIn.sharedInstance()?.currentUser to nil. 
// For example, if the user is already signed in:

print(GIDSignIn.sharedInstance()?.currentUser != nil) // true - signed in
GIDSignIn.sharedInstance()?.signOut()
print(GIDSignIn.sharedInstance()?.currentUser != nil) // false - signed out

除了注销外，disconnect()还允许用户撤消对该应用的访问权限。我认为这意味着如果他们选择再次登录，他们将需要重新授予您应用的任何权限。

根据Google's Developer Docs的说法，如果用户选择与您的应用断开连接，那么您需要删除已存储在您应用中的任何用户的Google数据。

此外，disconnect()是异步的。断开调用的结果将返回到GIDSignInDelegate.sign(_:didDisconnectWith:withError:)方法。

// Also sets GIDSignIn.sharedInstance()?.currentUser to nil. 
// Asynchronous call. If for example the user was already signed in:

print(GIDSignIn.sharedInstance()?.currentUser != nil) // true - signed in
GIDSignIn.sharedInstance()?.disconnect()
print(GIDSignIn.sharedInstance()?.currentUser != nil) // true - still signed in

// MARK: - GIDSignInDelegate
func sign(_ signIn: GIDSignIn!, didDisconnectWith user: GIDGoogleUser!, withError error: Error!) {
    print(GIDSignIn.sharedInstance()?.currentUser != nil) // false - signed out

    // Remove any data saved to your app obtained from Google's APIs for this user.
}

Answer 4

  public func logOut(on:UIViewController){

    let firebaseAuth = Auth.auth()
    do {
        try  firebaseAuth.signOut()
            GIDSignIn.sharedInstance().signOut()
            GIDSignIn.sharedInstance().disconnect()

        if let url = NSURL(string:  "https://www.google.com/accounts/Logout?continue=https://appengine.google.com/_ah/logout?continue=https://google.com"){
            UIApplication.shared.open(url as URL, options: [:]) { (true) in
                let appDel:AppDelegate = UIApplication.shared.delegate as! AppDelegate
                appDel.window?.rootViewController = LoginViewController()
            }
        }
    } catch let signOutError as NSError {
        Help.shared.Snack(messageString: "Error signing out: \(signOutError)" 
)
        print ("Error signing out: %@", signOutError)
    }
}

Answer 5

试试我的代码..

@IBAction func onClickSignOut(_ sender: UIButton) {

    GIDSignIn.sharedInstance()?.signOut()

    //        if GIDSignIn.sharedInstance()?.currentUser == nil {//Logged out
    //            self.navigationController?.popToRootViewController(animated: true)
    //        } else {//Not logged out
    //            //Your code here
    //        }

    /* check for user's token */
    if GIDSignIn.sharedInstance().hasAuthInKeychain() {
        //hasAuthInKeychain() : Checks whether the user has either currently signed in or has previous authentication saved in keychain.
        //Not logged out
        //Write your code here
        //......
    } else {
        //Logged out
        //Write logged out code here
        //EX:
        self.navigationController?.popToRootViewController(animated: true)
    }

}