无法从服务器 api 解析 JSON

Question

我正在使用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，一切似乎都很好，但问题是响应来自我在 AuthLoginCompleteBlock 块中创建的 message 字符串，NSDictionary 响应来自 NULL，看起来像这样（消息字符串)

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

在尝试这样获取时

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);
            }

出现以下错误

错误域=NSCocoaErrorDomain 代码=3840“字符 6 周围的对象中的值没有字符串键。” UserInfo={NSDebugDescription=在字符 6 附近的对象中没有值的字符串键。这意味着来自服务器的 Json 格式不正确？但是在邮递员中，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，请发表评论。

Answer 1

问题是我已经得到了一个字典，所以我不需要解析它。错误是这两行。

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

 AuthLoginCompleteBlock(YES,str,nil,nil);

我正在向已经是字典的块发送字符串。

Answer 2

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);


        }];