将AWS Cognito和aws-ios-sdk v.2.4.16与开发人员身份一起使用

Question

我设置了一组lambda函数来完成我的所有身份验证.我通过api网关从我的应用程序连接,然后最终调用GetOpenIdTokenForDeveloperIdentity().这会通过网关将identityId和token返回给我的设备.

接下来,我按照本网站的说明(针对Objective-C):http: //docs.aws.amazon.com/cognito/latest/developerguide/developer-authenticated-identities.html

因为我有identityId和令牌,所以我从这开始:

DeveloperProvider.h

#import <AWSCore/AWSCore.h>

@interface DeveloperProvider : AWSCognitoCredentialsProviderHelper

@end

DeveloperProvider.m

@implementation DeveloperProvider
/*
 * Use the token method to communicate with your backend to get an
 * identityId and token.
 */

// Below gave me an error and changed to: - (AWSTask <NSString *> *) token
- (AWSTask <NSString*>) token
{
    //Write code to call your backend:
    //Pass username/password to backend or some sort of token to authenticate user
    //If successful, from backend call getOpenIdTokenForDeveloperIdentity with logins map 
    //containing "your.provider.name":"enduser.username"
    //Return the identity id and token to client
    //You can use AWSTaskCompletionSource to do this asynchronously

    // Added this in to the code
    NSString *identityId = @"IdentityIdFromGateway";
    NSString *token = @"TokenGotFromGatewayToo";

    // Changed below code from this:
    // Set the identity id and return the token
    // self.identityId = response.identityId;
    // return [AWSTask taskWithResult:response.token];
    // to this:
    self.identityId = identityId;
    return [AWSTask taskWithResult:token];
}

@end

我从上面得到两个错误:

1. 在.h文件中,我找到'无法找到AWSCognitoCredentialsProviderHelper的界面'
2. 在.m文件中,我得到'identityId是对只读属性self.identityId的赋值

我重新安装了CocoaPods并重新安装了aws-ios-sdk.我甚至清理了所有旧文件和派生数据.

我错过了什么吗？最终目标是能够让经过身份验证的用户能够直接从应用程序调用dynamodb和s3,而无需使用网关和lambda,因为用户已经过身份验证.谢谢.