Question

我已按照此处的示例

https://github.com/awslabs/aws-sdk-ios-samples/tree/master/CognitoYourUserPools-Sample

将交互式cognito登录集成到我的iOS应用程序中。这一切都运行良好，但是当在池中创建新用户时，它们最初具有FORCE_CHANGE_PASSWORD状态。

对于Android，您可以按照以下步骤进行操作

http://docs.aws.amazon.com/cognito/latest/developerguide/using-amazon-cognito-user-identity-pools-android-sdk-authenticate-admin-created-user.html

但对于iOS，我无法找到如何做到这一点。使用该示例，如果我尝试以FORCE_CHANGE_PASSWORD状态登录用户，我会在控制台日志中看到以下输出（为简洁起见，删除了一些值）：

{ “ChallengeName”： “NEW_PASSWORD_REQUIRED”， “ChallengeParameters”：{ “requiredAttributes”： “[]”， “userAttributes”： “{\” email_verified \ “：\” 真\ “\” 自定义：autoconfirm \ “：\” Y \”， “会话”： “XYZ”}

以下是上面详述的示例中SignInViewController的代码。

import Foundation
import AWSCognitoIdentityProvider

class SignInViewController: UIViewController {
    @IBOutlet weak var username: UITextField!
    @IBOutlet weak var password: UITextField!
    var passwordAuthenticationCompletion: AWSTaskCompletionSource<AWSCognitoIdentityPasswordAuthenticationDetails>?
    var usernameText: String?

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.password.text = nil
        self.username.text = usernameText
        self.navigationController?.setNavigationBarHidden(true,   animated: false)
    }

    @IBAction func signInPressed(_ sender: AnyObject) {
        if (self.username.text != nil && self.password.text != nil) {
            let authDetails = AWSCognitoIdentityPasswordAuthenticationDetails(username: self.username.text!, password: self.password.text! )
            self.passwordAuthenticationCompletion?.set(result: authDetails)
        } else {
            let alertController = UIAlertController(title: "Missing information",
                                                message: "Please enter a valid user name and password",
                                                preferredStyle: .alert)
            let retryAction = UIAlertAction(title: "Retry", style: .default, handler: nil)
            alertController.addAction(retryAction)
        }
    }
}

extension SignInViewController: AWSCognitoIdentityPasswordAuthentication {

    public func getDetails(_ authenticationInput: AWSCognitoIdentityPasswordAuthenticationInput, passwordAuthenticationCompletionSource: AWSTaskCompletionSource<AWSCognitoIdentityPasswordAuthenticationDetails>)     {
        self.passwordAuthenticationCompletion = passwordAuthenticationCompletionSource
        DispatchQueue.main.async {
            if (self.usernameText == nil) {
                self.usernameText = authenticationInput.lastKnownUsername
            }
        }
    }

    public func didCompleteStepWithError(_ error: Error?) {
        DispatchQueue.main.async {
        if let error = error as? NSError {
            let alertController = UIAlertController(title: error.userInfo["__type"] as? String,
                                                    message: error.userInfo["message"] as? String,
                                                    preferredStyle: .alert)
            let retryAction = UIAlertAction(title: "Retry", style: .default, handler: nil)
            alertController.addAction(retryAction)

            self.present(alertController, animated: true, completion:  nil)
            } else {
                self.username.text = nil
                self.dismiss(animated: true, completion: nil)
            }
        }
    }
}

当didCompleteStepWithError执行时，error为空，我希望它指示某些内容告诉我们用户需要更改密码。

我的问题是如何捕获输出到控制台的"ChallengeName":"NEW_PASSWORD_REQUIRED" json？

Answer 1

现在对此进行排序。将它发布在这里，以防它帮助其他任何人。

首先，您需要创建一个允许用户指定新密码的视图控制器。 ViewController应该有AWSTaskCompletionSource<AWSCognitoIdentityNewPasswordRequiredDetails>作为属性：

var newPasswordCompletion: AWSTaskCompletionSource<AWSCognitoIdentityNewPasswordRequiredDetails>?

按照问题中提到的示例中的模式，然后我将AWSCognitoIdentityNewPasswordRequired实现为视图控制器的扩展，如下所示：

extension NewPasswordRequiredViewController: AWSCognitoIdentityNewPasswordRequired {
    func getNewPasswordDetails(_ newPasswordRequiredInput: AWSCognitoIdentityNewPasswordRequiredInput, newPasswordRequiredCompletionSource:
    AWSTaskCompletionSource<AWSCognitoIdentityNewPasswordRequiredDetails>) {                    
        self.newPasswordCompletion = newPasswordRequiredCompletionSource
    }

    func didCompleteNewPasswordStepWithError(_ error: Error?) {
        if let error = error as? NSError {
            // Handle error
        } else {
            // Handle success, in my case simply dismiss the view controller
            self.dismiss(animated: true, completion: nil)
        }
    }

}

再次按照问题中详述的示例设计，在AppDelegate的AWSCognitoIdentityInteractiveAuthenticationDelegate扩展名中添加一个函数：

extension AppDelegate: AWSCognitoIdentityInteractiveAuthenticationDelegate {
    func startPasswordAuthentication() -> AWSCognitoIdentityPasswordAuthentication {
        //Existing implementation
    }
    func startNewPasswordRequired() -> AWSCognitoIdentityNewPasswordRequired {
        // Your code to handle how the NewPasswordRequiredViewController is created / presented, the view controller should be returned
        return self.newPasswordRequiredViewController!
    }
}

Answer 2

在Cognito Console中创建用户时实现ResetPassword的完美示例。

但是，将此ResetPassword机制集成到现有应用程序是您的责任。

https://github.com/davidtucker/CognitoSampleApplication/tree/article1/CognitoApplication

在AWS iOS SDK中，如何处理FORCE_CHANGE_PASSWORD用户状态

2 个答案: