Question

我试图让地图向我展示多条路线，但对我来说它只是显示空白页面，即使地图没有显示。我的代码中的问题是什么，我无法找到它。它只是空白页。

这是我的代码：

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title></title>
    <style>
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #map {
        height: 100%;
        float: left;
        width: 63%;
        height: 100%;
    </style>
  </head>
  <body>
  <div id="map"></div>
    <script>

    var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 4,
          center: {lat: -24.345, lng: 134.46}
        });

        function renderDirections(result) {
          var directionsRenderer = new google.maps.DirectionsRenderer({
          draggable: true,
          map: map,
        });

          directionsRenderer.setMap(map);
          directionsRenderer.setDirections(result);
        }


        var directionsService = new google.maps.DirectionsService;

        function requestDirections(start, end) {
          directionsService.route({
            origin: start,
            destination: end,
            travelMode: 'DRIVING'
          }, function(result) {
            renderDirections(result);
          });
        }

        requestDirections('Huntsville, AL', 'Boston, MA');
        requestDirections('Bakersfield, CA', 'Vancouver, BC');

</script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=AIzaSyA6POCSerSPAK1t9zhKiFbiTDzh5TDPeYg&callback=initMap">
    </script>
  </body>
</html>

Answer 1

您忘记在代码中编写回调函数：

function initMap() {

   var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 4,
      center: {lat: -24.345, lng: 134.46}
    });

    function renderDirections(result) {
      var directionsRenderer = new google.maps.DirectionsRenderer({
      draggable: true,
      map: map,
    });

      directionsRenderer.setMap(map);
      directionsRenderer.setDirections(result);
    }


    var directionsService = new google.maps.DirectionsService;

    function requestDirections(start, end) {
      directionsService.route({
        origin: start,
        destination: end,
        travelMode: 'DRIVING'
      }, function(result) {
        renderDirections(result);
      });
    }

    requestDirections('Huntsville, AL', 'Boston, MA');
    requestDirections('Bakersfield, CA', 'Vancouver, BC');
}

因为您在src中调用它但从未实现它：

src="https://maps.googleapis.com/maps/api/js?key=AIzaSyA6POCSerSPAK1t9zhKiFbiTDzh5TDPeYg&callback=initMap"

谷歌地图api V3什么都没显示，空白页面

1 个答案: