0
  • 使用谷歌反向地理编码我得到一个 json。
  • 我需要从中访问特定字段。

我尝试了以下代码

private void Processjson(string jsonString)
{
    JsonData jsonvale = JsonMapper.ToObject(jsonString);

    Debug.Log (jsonvale["status"].ToJson()); // which prints "ok" on console


    parseJSON parsejson;

    string name = jsonvale["results"]["formatted_address"].ToString();
     debug.log(name);
}

这里我不能打印名字（formatted_address）

我的json文件如下

    {
   "results" : [
  {
     "address_components" : [
        {
           "long_name" : "Udumalpet-Poosaripatti-Negamam Road",
           "short_name" : "Udumalpet-Poosaripatti-Negamam Road",
           "types" : [ "route" ]
        },
        {
           "long_name" : "Seelakkampatti",
           "short_name" : "Seelakkampatti",
           "types" : [ "locality", "political" ]
        },
        {
           "long_name" : "Coimbatore",
           "short_name" : "Coimbatore",
           "types" : [ "administrative_area_level_2", "political" ]
        },
        {
           "long_name" : "Tamil Nadu",
           "short_name" : "TN",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "India",
           "short_name" : "IN",
           "types" : [ "country", "political" ]
        },
        {
           "long_name" : "642205",
           "short_name" : "642205",
           "types" : [ "postal_code" ]
        }
     ],
     "formatted_address" : "Udumalpet-Poosaripatti-Negamam Road, Seelakkampatti, Tamil Nadu 642205, India",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 10.6607381,
              "lng" : 77.1360873
           },
           "southwest" : {
              "lat" : 10.6576768,
              "lng" : 77.1228984
           }
        },
        "location" : {
           "lat" : 10.6581087,
           "lng" : 77.13010969999999
        },
        "location_type" : "GEOMETRIC_CENTER",
        "viewport" : {
           "northeast" : {
              "lat" : 10.6607381,
              "lng" : 77.1360873
           },
           "southwest" : {
              "lat" : 10.6576768,
              "lng" : 77.1228984
           }
        }
     },
     "place_id" : "ChIJ6SNTGUk0qDsRJs-tBBDJ6Ag",
     "types" : [ "route" ]
  },
  {
     "address_components" : [
        {
           "long_name" : "642205",
           "short_name" : "642205",
           "types" : [ "postal_code" ]
        },
        {
           "long_name" : "Tamil Nadu",
           "short_name" : "TN",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "India",
           "short_name" : "IN",
           "types" : [ "country", "political" ]
        }
     ],
     "formatted_address" : "Tamil Nadu 642205, India",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 10.698639,
              "lng" : 77.26073269999999
           },
           "southwest" : {
              "lat" : 10.6228222,
              "lng" : 77.05489420000001
           }
        },
        "location" : {
           "lat" : 10.6583181,
           "lng" : 77.1830243
        },
        "location_type" : "APPROXIMATE",
        "viewport" : {
           "northeast" : {
              "lat" : 10.698639,
              "lng" : 77.26073269999999
           },
           "southwest" : {
              "lat" : 10.6228222,
              "lng" : 77.05489420000001
           }
        }
     },
     "place_id" : "ChIJ9en3D_s0qDsRIcoj9NdDJRg",
     "types" : [ "postal_code" ]
  },
  {
     "address_components" : [
        {
           "long_name" : "Coimbatore",
           "short_name" : "Coimbatore",
           "types" : [ "administrative_area_level_2", "political" ]
        },
        {
           "long_name" : "Tamil Nadu",
           "short_name" : "TN",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "India",
           "short_name" : "IN",
           "types" : [ "country", "political" ]
        }
     ],
     "formatted_address" : "Coimbatore, Tamil Nadu, India",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 11.4057969,
              "lng" : 77.1766741
           },
           "southwest" : {
              "lat" : 10.21881,
              "lng" : 76.656036
           }
        },
        "location" : {
           "lat" : 10.9675289,
           "lng" : 76.91820969999999
        },
        "location_type" : "APPROXIMATE",
        "viewport" : {
           "northeast" : {
              "lat" : 11.4057969,
              "lng" : 77.1766741
           },
           "southwest" : {
              "lat" : 10.21881,
              "lng" : 76.656036
           }
        }
     },
     "place_id" : "ChIJtRyXL69ZqDsRl3v5ZMPoVUA",
     "types" : [ "administrative_area_level_2", "political" ]
  },
  {
     "address_components" : [
        {
           "long_name" : "Tamil Nadu",
           "short_name" : "TN",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "India",
           "short_name" : "IN",
           "types" : [ "country", "political" ]
        }
     ],
     "formatted_address" : "Tamil Nadu, India",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 13.496666,
              "lng" : 80.3464511
           },
           "southwest" : {
              "lat" : 8.0690069,
              "lng" : 76.23055409999999
           }
        },
        "location" : {
           "lat" : 11.1271225,
           "lng" : 78.6568942
        },
        "location_type" : "APPROXIMATE",
        "viewport" : {
           "northeast" : {
              "lat" : 13.496666,
              "lng" : 80.3464511
           },
           "southwest" : {
              "lat" : 8.0774075,
              "lng" : 76.23055409999999
           }
        }
     },
     "place_id" : "ChIJM5YYsYLFADsR8GEzRsx1lFU",
     "types" : [ "administrative_area_level_1", "political" ]
  },
  {
     "address_components" : [
        {
           "long_name" : "India",
           "short_name" : "IN",
           "types" : [ "country", "political" ]
        }
     ],
     "formatted_address" : "India",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 35.5087008,
              "lng" : 97.39535869999999
           },
           "southwest" : {
              "lat" : 6.4626999,
              "lng" : 68.1097
           }
        },
        "location" : {
           "lat" : 20.593684,
           "lng" : 78.96288
        },
        "location_type" : "APPROXIMATE",
        "viewport" : {
           "northeast" : {
              "lat" : 35.5087008,
              "lng" : 97.39498069999999
           },
           "southwest" : {
              "lat" : 6.7535159,
              "lng" : 68.16288519999999
           }
        }
     },
     "place_id" : "ChIJkbeSa_BfYzARphNChaFPjNc",
     "types" : [ "country", "political" ]
  }
   ],
   "status" : "OK"
}

我登录名称时的错误如下

InvalidOperationException: Instance of JsonData is not a dictionary
LitJson.JsonData.EnsureDictionary ()

我如何记录字段 [formatted_address]

4

1 回答 1

1

由于它是 Unity，我们已经拥有内置的 JsonUtility。我刚刚复制了你的 json 字符串并从JsonUtils生成了下面的类

public class AddressComponent
{
    public string long_name;
    public string short_name;
    public List<string> types;
}

public class Northeast
{
    public double lat;
    public double lng;
}

public class Southwest
{
    public double lat;
    public double lng;
}

public class Bounds
{
    public Northeast northeast;
    public Southwest southwest;
}

public class Location
{
    public double lat;
    public double lng;
}

public class Viewport
{
    public  northeast;
    public  southwest;
}

public class Geometry
{
    public Bounds bounds;
    public Location location;
    public string location_type;
    public Viewport viewport;
}

public class Result
{
    public List<AddressComponent> address_components;
    public string formatted_address;
    public Geometry geometry;
    public string place_id;
    public List<string> types;
}

public class Example
{
    public List<Result> results;
    public string status;
}

在单个脚本中添加上述类并将其添加到统一中。现在试试这段代码来获取格式化的地址。

private void Processjson(string jsonString)
{
    Example example = JsonUtility.FromJson<Example>(jsonString);

    Debug.Log (example.results[0].formatted_address);
}

如果需要，您可以重命名示例类

于 2017-07-20T13:09:05.450 回答