未捕获的TypeError:无法读取未定义的属性“ route”

时间:2019-10-03 14:52:15

标签: javascript api service maps directions

我刚开始使用路线服务。我已经对几个位置进行了硬编码,以确保它可以正常工作。我不断收到相同的错误(未捕获的TypeError:无法读取未定义的属性“ route”),我不知道为什么。该代码几乎是该文档中代码的精确副本。

    <script>
    var map;
    var directionsService;
    var directionsRenderer;

    function initMap() {
      var directionsService = new google.maps.DirectionsService();
      var directionsRenderer = new google.maps.DirectionsRenderer();

      var chicago = new google.maps.LatLng(38.627003, -90.199402);
      var mapOptions = {
        zoom:10,
        center: chicago
      }
      map = new google.maps.Map(document.getElementById('map'), mapOptions);
      directionsRenderer.setMap(map);
    }

    function calcRoute(start, end) {

      var request = {
        origin: "St Louis, MO",
        destination: "Chicago, IL",
        travelMode: 'DRIVING'
      };
        console.log(request);
      directionsService.route(request, function(result, status) {
        if (status == 'OK') {
          directionsRenderer.setDirections(result);
        }
      });
    }
</script>

1 个答案:

答案 0 :(得分:0)

没关系!我想到了。我在initMap()中重新声明了directionService和directionRender,这改变了这两个变量的范围!我将其更改为以下内容,并且有效。

    var map;
    var directionsService;
    var directionsRenderer;

    function initMap() {
      directionsService = new google.maps.DirectionsService();
      directionsRenderer = new google.maps.DirectionsRenderer();