javascript - 谷歌地图中的图标

Question

我编写了一个脚本，允许我为谷歌地图上的点添加自己的自定义图标，但是显示的 3 个图标中只有 2 个是我的自定义图标。另一个是默认的红点(这是第一个不正确的标记)。我不明白为什么它显示默认值而不是我的自定义值。

  <script type="text/javascript">
    var markers = [{
        "title": 'Northern NJ',
        "lat": '40.248',
        "lng": '-73.580',
        "description": '<p>test</P>.'
      },
      {
        "title": 'Central NJ',
        "lat": '39.763',
        "lng": '-73.710',
        "description": '<p>test</P>.'
      },
      {
        "title": 'Southern NJ',
        "lat": '39.161',
        "lng": '-74.098',
        "description": '<p>test</P>.'
      },
    ];
    window.onload = function() {
      LoadMap();
    }

    function LoadMap() {
      var mapOptions = {
        center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
        zoom: 5,
        streetViewControl: false,
        mapTypeId: 'satellite'
      };
      var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);

      //Create and open InfoWindow.
      var infoWindow = new google.maps.InfoWindow();

      for (var i = 0; i < markers.length; i++) {
        var data = markers[i];
        var myLatlng = new google.maps.LatLng(data.lat, data.lng);
        var marker = new google.maps.Marker({
          position: myLatlng,
          map: map,
          icon: icon,
          title: data.title
        });
        var icon = {
          url: 'https://static.wixstatic.com/media/e09925_8ec9d5e526f94859b5348b41e3daba74~mv2.png'
        };
        var ctaLayer = new google.maps.KmlLayer({
          url: 'https://docs.google.com/uc?id=1razdqFzFB_MWvExuehRUiqhgAeDBXZOI&amp;export=kml',
          map: map
        });

        //Attach click event to the marker.
        (function(marker, data) {
          google.maps.event.addListener(marker, "click", function(e) {
            //Wrap the content inside an HTML DIV in order to set height and width of InfoWindow.
            infoWindow.setContent("<div style = 'width:400px;min-height:150px'>" + data.description + "</div>");
            infoWindow.open(map, marker);
          });
        })(marker, data);
      }
    }

  </script>

我希望有人能弄清楚为什么只有两个人出现。

Answer 1

您在创建第一个标记后定义图标。将该定义移到第一个标记之前(或循环外部)并且它可以工作。

proof of concept fiddle

代码片段:

/* Always set the map height explicitly to define the size of the div
 * element that contains the map. */

#dvMap {
  height: 100%;
}


/* Optional: Makes the sample page fill the window. */

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

<div id="dvMap"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>
<script type="text/javascript">
  var markers = [{
      "title": 'Northern NJ',
      "lat": '40.248',
      "lng": '-73.580',
      "description": '<p>test</P>.'
    },
    {
      "title": 'Central NJ',
      "lat": '39.763',
      "lng": '-73.710',
      "description": '<p>test</P>.'
    },
    {
      "title": 'Southern NJ',
      "lat": '39.161',
      "lng": '-74.098',
      "description": '<p>test</P>.'
    },
  ];
  window.onload = function() {
    LoadMap();
  }

  function LoadMap() {
    var mapOptions = {
      center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
      zoom: 5,
      streetViewControl: false,
      mapTypeId: 'satellite'
    };
    var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);

    //Create and open InfoWindow.
    var infoWindow = new google.maps.InfoWindow();
    var icon = {
      url: 'https://static.wixstatic.com/media/e09925_8ec9d5e526f94859b5348b41e3daba74~mv2.png'
    };
    for (var i = 0; i < markers.length; i++) {
      var data = markers[i];
      var myLatlng = new google.maps.LatLng(data.lat, data.lng);
      var marker = new google.maps.Marker({
        position: myLatlng,
        map: map,
        icon: icon,
        title: data.title
      });
      var ctaLayer = new google.maps.KmlLayer({
        url: 'https://docs.google.com/uc?id=1razdqFzFB_MWvExuehRUiqhgAeDBXZOI&amp;export=kml',
        map: map
      });

      //Attach click event to the marker.
      (function(marker, data) {
        google.maps.event.addListener(marker, "click", function(e) {
          //Wrap the content inside an HTML DIV in order to set height and width of InfoWindow.
          infoWindow.setContent("<div style = 'width:400px;min-height:150px'>" + data.description + "</div>");
          infoWindow.open(map, marker);
        });
      })(marker, data);
    }
  }
</script>