DirectionsService.Route - 嘗試存取權限緯度，經度不工作

Question

從DestinationsService.Route迴應，我想訪問類似下面的lat和lng值：

var latitude0 = routes[0].legs[0].steps[0].start_location.lat; 
var longitude0 = routes[0].legs[0].steps[0].start_location.lng; 
console.log("var ["+latitude0+","+longitude0+"]"); 

與查看DestinationsService.Route Firefox的調試JSON響應如下所示：

"routes" : [ 
    { 
    "bounds" : {...} 
    }, 
    "copyrights" : "Map data ©2015 Google", 
    "legs" : [ 
     { 
      "distance" : {...}, 
      "duration" : {...}, 
      "end_address" : "something", 
      "end_location" : {...}, 
      "start_address" : "another thing", 
      "start_location" : {...}, 
      "steps" : [ 
       { 
       "distance" : {...}, 
       "duration" : { 
        "text" : "2 mins", 
        "value" : 104 
       }, 
       "end_location" : { 
        "lat" : 14.64548629999999, 
        "lng" : 21.0152624 
       }, 
       "html_instructions" : "...", 
       "polyline" : { 
        "points" : "..." 
       }, 
       "start_location" : { 
        "lat" : 14.64537809999999, 
        "lng" : 17.9754639 
       }, 
       "travel_mode" : "DRIVING" 

我可以訪問steps[0]中的所有其他字段和值，如

routes[0].legs[0].steps[0].travel_mode 

這給了我 「駕駛」 或

routes[0].legs[0].steps[0].duration.text 

這給了我 「2分鐘」。

但當訪問作爲解釋開始LAT和start_location或end_location LNG它給了我（這是控制檯打印出來）：

var [function(){"use strict"; return a},function(){"use strict";return b}] 

我在做什麼錯？ 在此先感謝您的幫助。

Answer 1

google.maps.LatLng對象有lat/lng方法，您需要調用它們以獲取適當的值。相反的：

var latitude0 = routes[0].legs[0].steps[0].start_location.lat; 
var longitude0 = routes[0].legs[0].steps[0].start_location.lng; 

務必：

var latitude0 = routes[0].legs[0].steps[0].start_location.lat(); 
var longitude0 = routes[0].legs[0].steps[0].start_location.lng(); 

working fiddle