jsapi也有提供高亮的实现接口，但这里没用，而用的是一种改变图形（graphic）样式的思路
本文实现效果是：地图有多个面图形，当鼠标移动到面的上方，面高亮显示，鼠标移出后高亮解除
初始化
//高亮初始化 highlightInit: function () { //添加一个图形图层存放要高亮的图形 let layer = new this.apiInstance.GraphicsLayer({ id: "highlightLayer", //空间参考，一般要跟地图的一样 spatialReference: this.mapView.spatialReference, }); //图层添加到地图 this.map.add(layer); //添加两个面 let wkt = "POLYGON((113.527839 22.27028,113.527238 22.2557786,113.5437178 22.2597268,113.54423 22.2730306,113.527839 22.27028))"; let style = { color: [50, 205, 50, 0.2], outline: { color: [255, 0, 0], width: 1 } }; let graphic = mapUtil.geometry.wktToPolygonGraphic(this.apiInstance, wkt, style, this.mapView.spatialReference, null); layer.graphics.add(graphic); wkt = "POLYGON((113.51319 22.26819,113.51473 22.257561,113.520480 22.25747,113.519966 22.26904,113.51319 22.26819))"; graphic = mapUtil.geometry.wktToPolygonGraphic(this.apiInstance, wkt, style, this.mapView.spatialReference, null); layer.graphics.add(graphic); }, 监听鼠标移动事件，这段代码通常在地图初始化后执行
//鼠标移动事件 this.mapView.on("pointer-move", function (event) { this.mapView.hitTest(event).then(function (response) { //鼠标移动到图形时高亮图形的实现 //原理：监听鼠标移动事件，当鼠标移动到某图形时，就改变改图形的样式（高亮实际是换一种更“亮”的样式），然后鼠标移出图形，就把图形样式恢复回去 //当前鼠标下的图形，也就是应该高亮的图形 let pointerFacilityGraphic = null; if (response.results[0]) { //获取到当前鼠标下方的图形 var graphic = response.results[0].graphic; if (graphic.layer) { if (graphic.layer.id === "highlightLayer") { //当前鼠标下的图形，也就是应该高亮的图形 pointerFacilityGraphic = graphic; } } } //实现高亮图形效果 if (pointerFacilityGraphic == null && this.highlightFacilityGraphic != null) { //当鼠标下没有图形，当前有高亮图形，把当前高亮的效果去掉 this.setGraphicHighlight(this.highlightFacilityGraphic, false); this.highlightFacilityGraphic = null; } else if (pointerFacilityGraphic != null && this.highlightFacilityGraphic == null) { //当鼠标下有图形，当前没有高亮图形，把鼠标图形设为高亮 this.setGraphicHighlight(pointerFacilityGraphic, true); this.highlightFacilityGraphic = pointerFacilityGraphic; } else if (pointerFacilityGraphic != null && this.highlightFacilityGraphic === pointerFacilityGraphic) { //当鼠标下有图形，且跟当前高亮图形是同一个，不做任何事 } else if (pointerFacilityGraphic != null && this.highlightFacilityGraphic !== pointerFacilityGraphic) { //当鼠标下有图形，且跟当前高亮图形不同一个，把鼠标图形设为高亮，把当前高亮的效果去掉 this.setGraphicHighlight(this.highlightFacilityGraphic, false); this.setGraphicHighlight(pointerFacilityGraphic, true); this.highlightFacilityGraphic = pointerFacilityGraphic; } }.bind(this)) }.bind(this)); 设置图层高亮
//设置图形高亮效果 //参数1：图形 //参数2：是否高亮 setGraphicHighlight: function (graphic, isHighlight) { //基础样式 //本例中，正常样式的填充透明度是0.2，高亮时透明度0.7 let style = { type: "simple-fill", color: [50, 205, 50, 0.2], outline: { color: [255, 0, 0], width: 1 } }; if (isHighlight) { //高亮 style.color = [50, 205, 50, 0.7]; graphic.symbol = style; } else { //不高亮 style.color = [50, 205, 50, 0.2]; graphic.symbol = style; } },