Question

我正在尝试为编写Swift 3的iOS应用程序创建用户登录系统。使用下面的代码，我在用户池中为用户获取了唯一的Cognito Identity ID，但我不知道如何处理此ID。我可以将其链接到用户并获取与该用户关联的属性吗？

代码：

@IBAction func loginPressed(_ sender: Any) {
    user = self.pool!.getUser(usernameTextField.text!)
    user?.getSession(usernameTextField.text!, password: passwordTextField.text!, validationData: nil).continue({ task in
        if let err = task.error {  // some sort of error
            print("LOGIN FAILED")
            print(err)
            //print(err.userInfo["message"] as! String)
        }
        else { //Successful login!

            // this gets our token from the User Pool
            let ret = task.result! as AWSCognitoIdentityUserSession
            let myToken = ret.idToken?.tokenString;

            print("Token: ", myToken);

            let customcedentialProvider = AWSCustomIdentityProvider(tokens: [AWSCustomIdentityProvider.CognitoTokenKey : myToken!])
            let credentialsProvider = AWSCognitoCredentialsProvider(regionType: CognitoConstants.COGNITO_REGIONTYPE, identityPoolId: CognitoConstants.COGNITO_IDENTITY_POOL_ID,  identityProviderManager: customcedentialProvider)
            let configuration = AWSServiceConfiguration(region: CognitoConstants.COGNITO_REGIONTYPE, credentialsProvider:credentialsProvider)
            AWSServiceManager.default().defaultServiceConfiguration = configuration

            // wipe cached creds
            credentialsProvider.clearKeychain()
            credentialsProvider.clearCredentials()

            // hit it
            credentialsProvider.getIdentityId().continue({ (task: AWSTask!) -> AnyObject! in

                if (task.error != nil) {
                    print("Error: ")

                } else {

                    // the task result will contain the identity id
                    let UserIdentityID = task.result as String? // Im saving user identity id in constant variable called "kUserIdentityID"
                    print(UserIdentityID)// my identityID
                    print(credentialsProvider.identityId)// my identityID
                }

                return nil
            })

        }
    return nil
    })
}

输出（身份证号码）：

Optional("us-east-1:XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX")

谢谢！

Answer 1

Cognito UserPool是一个“身份提供者”，如Facebook，Google等。而Cognito Federated Identity有助于将不同登录之间的映射保持为一个唯一ID，通常称为“Cognito Identity ID”。通常，您在Cognito Federated身份下的数据集内存储和检索数据。并同步多个登录。如果我理解您的问题，您可能希望将userpool“username”存储在上述数据集中，以便您可以检索它并查询用户池

Answer 2

The self.pool refers to your Cognito User Pool. User pools have at least a username and password, but usually also other attributes, which you can fetch using user.getDetails. A user pool is an IdP (an Identity Provider).

The identityId is a Cognito Identity concept which primarily has the purpose of providing a unique id for one or more identities from IdP's.

Don't worry about being confused. Cognito is very confusing, I found it so confusing that I wrote up a little powerpoint presentation from my notes. Here is a link to a diagram that should help you. Diagram of Cognito

另外，我建议您使用AWS Mobile Hub Helper作为起点。它将下载一个快速的代码示例应用程序。示例代码使用aws-mobilehub-helper-ios包装器，它简化了许多SDK并使其更加合理。下载的代码是Swift2，但在swift 3中运行并不是很难。

如何将Cognito Identity ID与用户属性相关联？

2 个答案: