面覆盖物支持圆Circle和多边形Polygon两类

示例代码如下：

MapComponent({ onReady:  async (err, mapController) => {
    if(!err){
            this.mapController = mapController;
            // 带有描边的圆
            let stroke:Stroke = new Stroke({
                 strokeWidth: 12,
                 color: '#f00',
                 strokeStyle: 'square'
            });
            this.circle = new Circle({
                 center: new LatLng(39.915935, 116.402119),
                 fillcolor: 'rgba(200, 120, 56, 0.5)',
                 radius: 6000,
                 stroke: stroke
            });
            this.circle.setCenter(new LatLng(39.916935, 116.372119));
            this.circle.setFillcolor('#0ff');
            this.mapController?.addOverlay(this.circle);
     }
}, mapOptions: this.mapOpt}).width('100%').height('100%')

示例代码如下：

MapComponent({ onReady: (err,mapController:MapController) => {
     if (mapController) {
          this.mapController = mapController;
          // 添加多边形覆盖物
          let pathArr: LatLng[] = [
               new LatLng(39.9122, 116.2575),
               new LatLng(40.0191, 116.4624),
               new LatLng(39.913506, 116.4955)
          ];
          this.polygon = new Polygon({
               points: pathArr,
               fillcolor: '#0f0',
               stroke: new Stroke({
                    strokeWidth: 12,
                    color:'#0f0',
                    strokeStyle: SysEnum.StrokeStyle.SQUARE
               })
          });
          this.polygon.setPoints(pathArr);
          this.polygon.setFillcolor('#f9f');
          this.mapController.addOverlay(this.polygon);
       }
}, mapOptions: this.mapOpt}).width('100%').height('100%')