Ios 无法从服务器api解析JSON

我使用AFNetworking通过以下代码从服务器获取post api响应

void (^AuthLoginCompleteBlock)(BOOL success, NSString *message, NSDictionary *response, NSError *error);
-(void)login:(NSString *)user password:(NSString *)password deviceID:(NSString *)deviceID callback:(authRequestCompleteBlock)callback{

    AuthLoginCompleteBlock = callback;
    NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:user,@"data[User][username]]",password,@"data[User][password]]",deviceID,@"data[User][device_id]]", nil];

    AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html", nil];
    [manager POST:[NSString stringWithFormat:@"%@/%@",SERVER_URL,LOGIN] parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSString *str = [NSString stringWithFormat:@"%@",responseObject];

        AuthLoginCompleteBlock(YES,str,nil,nil);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

        AuthLoginCompleteBlock(NO,error.description,nil,nil);
    }];
    NSLog(@"param = %@",parameters);
}

现在URL工作正常，一切正常，但问题是响应来自于我在AuthLoginCompleteBlock块中创建的消息字符串，NSDictionary响应为空，类似于此消息字符串

{
    message = "Please enter valid email related to your account.";
    status = failed;
}

当你试着这样拿东西的时候

NSData *jsonData = [message dataUsingEncoding:NSUTF8StringEncoding];

            NSError *error = nil;
            id json = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:&error];
            if(!error) {
                NSLog(@"hello = %@", json);
            }
            else{
                NSLog(@"errr = %@",error.description);
            }

得到以下错误

Error Domain=NSCOCAERRORDOMAIN Code=3840字符6周围的对象中的值没有字符串键。UserInfo={NSDebugDescription=对象中的值在字符6附近没有字符串键。这意味着服务器的Json格式不正确？但在postman中，响应如下，并且非常好

{
  "status": "failed",
  "message": "Please enter valid email related to your account."
}

---

如果我遗漏了什么，请评论。

问题是我已经得到了一本字典，所以我不需要解析它。错误是这两行

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
        manager.requestSerializer = [AFHTTPRequestSerializer serializer];

        NSDictionary *parameters = @{
                                     @"user": @"login",

                                     @"password": txtFieldPassword.text,

                                     @"device": @"ios",
                                     @"deviceToken": strToken,


                                     };


        NSLog(@"parameters is ====%@",parameters);
        manager.responseSerializer = [AFJSONResponseSerializer
                                      serializerWithReadingOptions:NSJSONReadingAllowFragments];
        [manager POST:@"yourUrl" parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject)

        {

            NSLog(@"success!%@",responseObject);
            [self successfullLogin:responseObject];


        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error)
        {
            NSLog(@"error: %@", error);


        }];

 NSString *str = [NSString stringWithFormat:@"%@",responseObject];

 AuthLoginCompleteBlock(YES,str,nil,nil);

---

我正在将字符串发送到我的块，该块已经是一个字典。

似乎AFNetworking 3.0没有AFHTTPRequestOperationManager。是的，AFHTTPRequestOperationManager未包含在pod AFNetworking 3.0中