NSOperation operation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation operation, id responseObject) {

    
    HttpResult *result = [HttpResult parseResult:[operation responseString]andISNeedEncrypt:params.ISNEED_ENCRYPT];
    if (result.jsonDict) {
        //有返回值
        resultBlcok(result.jsonDict);
    }
    else if(result.kvdata)
    {
        resultBlcok(result.kvdata);
    }
    else if(result.dataset)
    {
        resultBlcok(result.dataset);
    }
    else if(result.message){
        
        resultBlcok(result.message);
       
    }
    else{
       
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
   
    if (error.localizedDescription != nil) {
       
    } else {
    }
    errorBlock(error);
}];
[manager.operationQueue addOperation:operation];

此段代码如何用AFN3.0以上替换