步行路线规划可以根据起终点获取驾车步行规划数据，并可以通过Polyline绘制出步行路线，效果图：

wr: WalkingRoute = new WalkingRoute();
// 步行路线规划
wr.getRouteLines(fromArr, toArr, (res: routes) => {
      let routes = res.routes;
      let line: Array<Latlng> = []
      // 解析轨迹
      for (let i = 0; i < routes.length; i++) {
            let step: step = routes[i]
            let paths: Array<Latlng> = step.path
            for (let i = 0; i < paths.length; i++) {
                  let ll: Latlng = new Latlng(paths[i].lat, paths[i].lng)
                   line.push(ll)
            }
      }
      // 绘制轨迹
      let polyline:Polyline = new Polyline({
           points: line,
           fillcolor: '#6af',
           width: 10,
           join: SysEnum.LineJoinType.ROUND,
           cap: SysEnum.LineCapType.ROUND,
           isThined: true,
           isGeodesic: true
      });
      this.mapController?.addOverlay(polyline);
}, {})