ios - 在 JSON 中获取无效的顶级类型写入 iOS

Question

我尝试使用 AFNetworking 解析 json 响应，但它返回错误；

Invalid top-level type in JSON writes

但是我的json如下，关于json格式没有问题，我在网上查了json没问题。

{
  "Result": {
    "RoomDetail": [
      {
        "RoomName": "crs",
        "NaturalName": "aaa"
      },
      {
        "RoomName": "ios",
        "NaturalName": "ios"
      }
    ]
  }
}

这是我使用的代码:

-(void)CallRoom
{
    @try {
        AFHTTPRequestOperationManager *managers = [AFHTTPRequestOperationManager manager];

        NSMutableDictionary *parameter = [[NSMutableDictionary alloc]initWithObjectsAndKeys:
                                           @"bhavin",@"userName",
                                           nil];

        NSString *setUrl = [NSString stringWithFormat:@"http://localhost/OpenFire-Chat/getChatRoomsByUser.htm"];

        managers.responseSerializer = [AFHTTPResponseSerializer serializer];

        [managers POST:setUrl parameters:parameter success:^(AFHTTPRequestOperation *operation, id responseObject) {

            NSError *writeError = nil;
            NSData *jsonData;

            //if ([NSJSONSerialization isValidJSONObject:responseObject])
            {
                jsonData = [NSJSONSerialization dataWithJSONObject:responseObject options:NSJSONWritingPrettyPrinted error:&writeError];
            }


            NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                options:NSJSONReadingMutableContainers
                                                                  error:&writeError];
        }failure:^(AFHTTPRequestOperation *operation, NSError *error) {

            NSLog(@"Error: %@", error);
         }];

    }
    @catch (NSException *exception) {
     }


}

编辑

好的，所以我的 Web 服务 API 中有一个错误:

我没有将 Response header 中的 ContentType 设置为 application/Json.

Answer 1

可能是您缺少 acceptableContentTypes。

只需尝试下面的代码:

AFJSONRequestSerializer *serializer = [AFJSONRequestSerializer serializer];
[serializer setStringEncoding:NSUTF8StringEncoding];

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

manager.responseSerializer.acceptableContentTypes=[NSSet setWithObjects:@"text/html",@"application/json", nil];

NSMutableDictionary *parameter = [[NSMutableDictionary alloc]initWithObjectsAndKeys:
                                  @"bhavin",@"userName",
                                  nil];

NSString *setUrl = [NSString stringWithFormat:@"http://localhost/OpenFire-Chat/getChatRoomsByUser.htm"];

[manager POST:setUrl parameters:parameter progress:nil success:^(NSURLSessionTask *task, id responseObject)
     {
         //log responseObject
     } failure:^(NSURLSessionTask *operation, NSError *error) {

     }];