L.marker([obj.Y,obj.X]).addTo(map).bindPopup(obj.name).openPopup();

let layers=[];
let myGroup=L.layerGroup(layers);
let that = this;
this.bus.$on("selectedTree",function(obj){
        //清除点位(清除一组点位)
        layers.splice(0,layers.length);
        myGroup.clearLayers();
//具体操作
//...
});