Question

我使用Dennis Wilhelm的Leaflet Slider来显示Leaflet地图上的数据变化。

我正在尝试更改标记图标的更改，但没有将其更正。那么，当使用Leaflet Slider显示随时间的变化时，如何更改标记图标？我需要在原始的SliderControl.js中做些什么改变？

提前致谢！

以下是Dennis Wilhelm的Leaflet Slider代码的链接：

https://github.com/dwilhelm89/LeafletSlider/blob/master/SliderControl.js

Answer 1

您可以创建新的图标类，如下所示：

var LeafIcon = L.Icon.extend({
    options: {
       iconSize:     [38, 95],
       shadowSize:   [50, 64],
       iconAnchor:   [22, 94],
       shadowAnchor: [4, 62],
       popupAnchor:  [-3, -76]
    }
});

然后创建一个新的图标对象，如下所示：

var greenIcon = new LeafIcon({
    iconUrl: 'http://leafletjs.com/examples/custom-icons/leaf-green.png',
    shadowUrl: 'http://leafletjs.com/examples/custom-icons/leaf-shadow.png'
})

现在，您可以在地图上方标记的上方图标如下：

L.marker([51.5, -0.09], {icon: greenIcon}).addTo(map);

您可以参考此document获取更多信息。

对于slidercontrol，您需要创建两个图像：

(1) Marker Icon [ Use name: marker-icon.png ]
(2) Marker Icon Shadow [ Use name: marker-shadow.png ]

之后，您可以指定默认图像路径，如下所示：

L.Icon.Default.imagePath = "Url to the image folder"; // This specifies image path for marker icon. 
e.x L.Icon.Default.imagePath = "http://leafletjs.com/examples/custom-icons";

因此图标网址为：

Icon URL  :  http://leafletjs.com/examples/custom-icons/marker-icon.png
Shadow URL:  http://leafletjs.com/examples/custom-icons/marker-shadow.png

Answer 2

这将是原始slidercontrol.js文件中的确切更改

   if (this._layer) {
        var index_temp = 0;
        this._layer.eachLayer(function (layer) {

             var greenIcon = L.icon({ //add this new icon
                iconUrl: i+'.png',
                shadowUrl: 'leaf-shadow.png',

                iconSize:     [38, 95], // size of the icon
                shadowSize:   [50, 64], // size of the shadow
                iconAnchor:   [22, 94], // point of the icon which will correspond to marker's location
                shadowAnchor: [4, 62],  // the same for the shadow
                popupAnchor:  [-3, -76] // point from which the popup should open relative to the iconAnchor
            });

            options.markers[index_temp] = layer;
            options.markers[index_temp].setIcon(greenIcon); //Here set the icon to indiviual markers

            ++index_temp;
        });
        options.maxValue = index_temp - 1;
        this.options = options;
    }

Answer 3

var century21icon = L.icon({
    iconUrl: 'https://i.ibb.co/sJrMTdz/favicon-32x32.png',
    iconSize: [20, 20]
    });
var maker = L.marker([25.045403,121.526088],{icon: century21icon}).addTo(map);

Answer 4

以防万一有人想知道如何使用vue2-leaflet在Typescript中进行操作，下面是一个示例代码。您甚至可以使用v-for on l-marker一次性绘制多个标记：

// inside template
<l-marker :lat-lng="position"
            :icon="defaultIcon" :key="index">
            <l-icon
                :icon-size=[20,40]
                :popupAnchor= [0,0]
                :iconUrl= "'assets/logo.png'"
                :shadowUrl= "'assets/logo.png'" >
                  <v-icon medium >
                    mdi-target
                  </v-icon>
            </l-icon>
</l-marker>

// default icon in script
defaultIcon = L.icon({
      iconUrl: "https://unpkg.com/leaflet@1.0.3/dist/images/marker-icon.png",
      shadowUrl: require('../static/marker.png'),
      iconSize: [20, 30],
      iconAnchor: [18, 18],
      popupAnchor: [0, -10],
      shadowSize: [0, 0],
      shadowAnchor: [10, 10]
    });

改变传单标记图标

4 个答案: