iOS Swift，AWS Cognito用户池，无法刷新访问令牌 [英] iOS Swift, AWS Cognito User Pool, Unable to Refresh Access Token

问题描述

看过类似的SO问题，这些问题无法帮助我解决问题。

Looked at similar SO questions which didn't help me resolve the issue.

我正在iOS应用中使用AWS Cognito用户池。我们能够成功创建并登录用户。但是在大约Hr之后访问令牌不可用，我从AWS Cognito文档中了解到iOS SDK自动刷新（此处也提到了），并在不可用时获取令牌，但是我看不到这种行为。以下代码显示了我如何尝试获取访问令牌。

I am using AWS Cognito User Pools in our iOS App. We are able to successfully create and login the user. However after about an Hr the access token is not available, I understand from AWS Cognito documentation that the iOS SDK automatically refreshes (also mentioned here) and obtains the token when it is not available, however I don't see this behaviour. The below code shows how I am trying to obtain the access token.

使用iOS SDK AWSCognitoIdentityProvider 2.6.7

Using iOS SDK AWSCognitoIdentityProvider 2.6.7

请告知我如何解决此问题。

Please advice how I can resolve the issue.

let mySession = self.pool.currentUser()?.getSession()

guard let accessToken = mySession?.result?.accessToken?.tokenString as? String else {
  print("Unable to obtain access token")
  self.handleSignOut() // Signing out the user since there is no access token       
  return
}

推荐答案

getSession（）返回一个AWSTask。

getSession() returns an AWSTask.

您必须在回调中访问 tokenString 。

以下代码对我有用：

self.pool.currentUser()?.getSession().continueWith { task in

    if task.error == nil {
        let session = task.result! as AWSCognitoIdentityUserSession
        guard let accessToken = session.idToken?.tokenString; as? String else {
           print("Unable to obtain access token")
           self.handleSignOut() // Signing out the user since there is no access token       
        }
    }
}

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