我正在尝试使用我的Unity内部谷歌的地理服务。我是这样做的：
WWW www = new WWW("https://maps.googleapis.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&oe=utf-8&key="+googleKey);
yield return www;
if (!string.IsNullOrEmpty(www.error)){
print(www.error);
} else {
var newobject = JsonConvert.DeserializeObject(www.text);
print ("Object: " + newobject);
}
这部分工作正常，我得到了我想要的结果......但是知道我只需要从结果中得到纬度和经度，但我不知道该怎么做？
以下是我从谷歌获得的结果：
{
"results": [
{
"address_components": [
{
"long_name": "1600",
"short_name": "1600",
"types": [
"street_number"
]
},
{
"long_name": "Amphitheatre Parkway",
"short_name": "Amphitheatre Pkwy",
"types": [
"route"
]
},
{
"long_name": "Mountain View",
"short_name": "Mountain View",
"types": [
"locality",
"political"
]
},
{
"long_name": "Santa Clara County",
"short_name": "Santa Clara County",
"types": [
"administrative_area_level_2",
"political"
]
},
{
"long_name": "California",
"short_name": "CA",
"types": [
"administrative_area_level_1",
"political"
]
},
{
"long_name": "United States",
"short_name": "US",
"types": [
"country",
"political"
]
},
{
"long_name": "94043",
"short_name": "94043",
"types": [
"postal_code"
]
}
],
"formatted_address": "1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA",
"geometry": {
"location": {
"lat": 37.422364,
"lng": -122.084364
},
"location_type": "ROOFTOP",
"viewport": {
"northeast": {
"lat": 37.4237129802915,
"lng": -122.0830150197085
},
"southwest": {
"lat": 37.421015019708513,
"lng": -122.0857129802915
}
}
},
"place_id": "ChIJ2eUgeAK6j4ARbn5u_wAGqWA",
"types": [
"street_address"
]
}
],
"status": "OK"
}
我想我需要这样做：
"geometry": {
"location": {
"lat": 37.422364,
"lng": -122.084364
},
但是我该怎么做？
任何帮助都表示赞赏，并提前感谢： - ）
答案 0 :(得分：2)
你是对的。您需要Json中的我想我需要这样做：
"geometry": { "location": { "lat": 37.422364, "lng": -122.084364 },
geometry对象。我之前使用Google的API来取回对象。
您需要在C＃中创建一些类，这些类映射到Json对象的相同/相关属性。然后你可以使用JsonConvert将你的Json字符串转换回一些C＃对象 - http://www.newtonsoft.com/json/help/html/t_newtonsoft_json_jsonconvert.htm
一个很好用的工具是http://json2csharp.com/，它允许你粘贴你的Json代码，并从另一端获得一些可识别的C＃类。
显然，你可以删除任何你绝对不需要的属性。
你的最终结果应该是这样的（复制/粘贴到/从json2csharp.com）：
public class AddressComponent
{
public string long_name { get; set; }
public string short_name { get; set; }
public List<string> types { get; set; }
}
public class Location
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Northeast
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Southwest
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Viewport
{
public Northeast northeast { get; set; }
public Southwest southwest { get; set; }
}
public class Geometry
{
public Location location { get; set; }
public string location_type { get; set; }
public Viewport viewport { get; set; }
}
public class Result
{
public List<AddressComponent> address_components { get; set; }
public string formatted_address { get; set; }
public Geometry geometry { get; set; }
public string place_id { get; set; }
public List<string> types { get; set; }
}
public class RootObject
{
public List<Result> results { get; set; }
public string status { get; set; }
}
然后使用JsonConvert创建一些对象，你可以这样做：
RootObject rootObject = JsonConvert.DeserializeObject<RootObject>(www.text);
然后，您可以通过迭代它们（或访问Geometry）等来访问Result中的.First()个对象。
像这样：
foreach (var resultObject in rootObject.results)
{
var geometry = resultObject.geometry;
var location = geometry.location;
var lat = location.lat;
var lng = location.lng
}
为了整理，您还可以重命名一些属性以使它们更“友好”，然后使用属性装饰它们，以便JsonConvert仍然知道要映射哪个Json属性。
像这样：
[JsonProperty(PropertyName = "a_json_property")]
public string ACSharpProperty { get; set; }
有任何问题，请告诉我。
希望这有帮助！ ：）
答案 1 :(得分：1)
您需要创建一个数据结构来存储Json数据。使用Unity的JsonUtility.FromJson，您可以提取json数据并将其存储到该数据结构中。
请记住，由于结果是array / list，因此您必须遍历它以获取所有值。您必须从每个类中删除{ get; set; }，并且还必须在每个类的顶部包含[System.Serializable]。只要您拥有Unity 5.3及更高版本，就不需要外部API。这是经过测试的完整解决方案。
[System.Serializable]
public class AddressComponent
{
public string long_name;
public string short_name;
public List<string> types;
}
[System.Serializable]
public class Location
{
public double lat;
public double lng;
}
[System.Serializable]
public class Northeast
{
public double lat;
public double lng;
}
[System.Serializable]
public class Southwest
{
public double lat;
public double lng;
}
[System.Serializable]
public class Viewport
{
public Northeast northeast;
public Southwest southwest;
}
[System.Serializable]
public class Geometry
{
public Location location;
public string location_type;
public Viewport viewport;
}
[System.Serializable]
public class Result
{
public List<AddressComponent> address_components;
public string formatted_address;
public Geometry geometry;
public string place_id;
public List<string> types;
}
[System.Serializable]
public class GoogleJson
{
public List<Result> results;
public string status;
}
使用它：
void Start()
{
//Replace value with what you got from WWW
string value = "{\r\n \"results\": [\r\n {\r\n \"address_components\": [\r\n {\r\n \"long_name\": \"1600\",\r\n \"short_name\": \"1600\",\r\n \"types\": [\r\n \"street_number\"\r\n ]\r\n },\r\n {\r\n \"long_name\": \"Amphitheatre Parkway\",\r\n \"short_name\": \"Amphitheatre Pkwy\",\r\n \"types\": [\r\n \"route\"\r\n ]\r\n },\r\n {\r\n \"long_name\": \"Mountain View\",\r\n \"short_name\": \"Mountain View\",\r\n \"types\": [\r\n \"locality\",\r\n \"political\"\r\n ]\r\n },\r\n {\r\n \"long_name\": \"Santa Clara County\",\r\n \"short_name\": \"Santa Clara County\",\r\n \"types\": [\r\n \"administrative_area_level_2\",\r\n \"political\"\r\n ]\r\n },\r\n {\r\n \"long_name\": \"California\",\r\n \"short_name\": \"CA\",\r\n \"types\": [\r\n \"administrative_area_level_1\",\r\n \"political\"\r\n ]\r\n },\r\n {\r\n \"long_name\": \"United States\",\r\n \"short_name\": \"US\",\r\n \"types\": [\r\n \"country\",\r\n \"political\"\r\n ]\r\n },\r\n {\r\n \"long_name\": \"94043\",\r\n \"short_name\": \"94043\",\r\n \"types\": [\r\n \"postal_code\"\r\n ]\r\n }\r\n ],\r\n \"formatted_address\": \"1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA\",\r\n \"geometry\": {\r\n \"location\": {\r\n \"lat\": 37.422364,\r\n \"lng\": -122.084364\r\n },\r\n \"location_type\": \"ROOFTOP\",\r\n \"viewport\": {\r\n \"northeast\": {\r\n \"lat\": 37.4237129802915,\r\n \"lng\": -122.0830150197085\r\n },\r\n \"southwest\": {\r\n \"lat\": 37.421015019708513,\r\n \"lng\": -122.0857129802915\r\n }\r\n }\r\n },\r\n \"place_id\": \"ChIJ2eUgeAK6j4ARbn5u_wAGqWA\",\r\n \"types\": [\r\n \"street_address\"\r\n ]\r\n }\r\n ],\r\n \"status\": \"OK\"\r\n}";
GoogleJson gJson = null;
gJson = JsonUtility.FromJson<GoogleJson>(value);
for (int i = 0; i < gJson.results.Count; i++)
{
Debug.Log("RESULT: " + i);
Debug.Log("Geometry lat: " + gJson.results[i].geometry.location.lat);
Debug.Log("Geometry lng: " + gJson.results[i].geometry.location.lng);
}
}