antv/l7 设置图例

引入Control 基类

import { Control } from "@antv/l7";

初始化基类

 const legend = new Control({
        position: "bottomright"
  });

设置Control 展示的内容,

通过扩展Control 的onAdd 方法我们*定制control 需要展示内容和交互。

legend.onAdd = function () {
        let  el = document.createElement("div");
        el.className = "infolegend legend";
        let  grades = [0, 10, 20, 50, 100, 200, 500];
        let color= ["#FFF5B8", "#FFDC7D", "#FFAB5C", "#F27049", "#D42F31", "#730D1C"]
        for (var i = 0; i < grades.length; i++) {
          el.innerHTML +=
            '<i style="background:' +
            color[i] +
            '"></i> ' +
            grades[i] +
            (grades[i + 1] ? "–" + grades[i + 1] + "<br>" : "+");
        }
        return el;
      };

添加到地图中

scene.addControl(legend)

还要加上css

.legend {
	line-height: 18px;
	color: #555;
}
.legend i {
	width: 18px;
	height: 18px;
	float: left;
	margin-right: 8px;
	opacity: 0.7;
}

效果图