vue项目，百度地图api高亮选取区域，高亮某个地区，行政区域等

效果如下：

    var blist = []
    var districtLoading = 0


    var map = new window.BMap.Map("container",{ minZoom:5,maxZoom:20 });// 创建地图实例
    var point = new window.BMap.Point(89.48,31.57);
    map.centerAndZoom(point,7.4);//设置中心点坐标和地图级别
    map.enableScrollWheelZoom(); // 允许滚轮缩放
    this.zoom = map.getZoom();
    this.map = map;
    this.getBoundary();





    /*
    =====获取行政区域边界=====
    */
    getBoundary() {   
       this.addDistrict("西藏");
    },
    /*
    =====添加行政区域=====
    */
    addDistrict(districtName) {
      let that = this;
      //使用计数器来控制加载过程
      districtLoading++;
      var bdary = new BMap.Boundary();
      bdary.get(districtName, function (rs) {       //获取行政区域
          var count = rs.boundaries.length; //行政区域的点有多少个
          for (var i = 0; i < count; i++) {
            blist.push({ points: rs.boundaries[i], name: districtName });
          };
          //加载完成区域点后计数器-1
          districtLoading--;
          if (districtLoading == 0) {
            //全加载完成后画端点
            that.drawBoundary();
          }
      });
    },
    /*
    =====点击行政区域事件=====
    */
    click(evt) {
      alert(evt.target.name);
    },
    /*
    =====绘制边界=====
    */
    drawBoundary() {
      let that = this;
      //包含所有区域的点数组
      var pointArray = [];
      //循环添加各闭合区域
      for (var i = 0; i < blist.length; i++) {
        //添加多边形层并显示
        var ply = new BMap.Polygon(blist[i].points, { 
          strokeWeight: 2,   //边框宽度
          trokeColor: "#FFA96E",   //边框颜色
          fillColor: " #DDE4F070" //填充颜色
        }); //建立多边形覆盖物
        ply.name = blist[i].name;
        // ply.addEventListener("click", that.click);
        this.map.addOverlay(ply);

        //将点增加到视野范围内
        var path = ply.getPath();
        pointArray = pointArray.concat(path);
      }

      //限定显示区域(只显示特定区域，鼠标拖动松开后自动回到显示范围内)，需要引用api库
      // var boundply = new BMap.Polygon(pointArray);
      // BMapLib.AreaRestriction.setBounds(map, boundply.getBounds());
      this.map.setViewport(pointArray);    //调整视野 
    },