使用vue-baidu-map时找不到BMap对象报错，BMap不是defind

methods:{//检测地图加载并完成onmapReady({bmap,map}){this.bmap=bmap;},getDistance(p1,p2){try{const_this=this;constbmap=this.bmap;const(newBMap.Point(116.404,39.915),{onSearchComplete:function(results){_this.distance=Math.floor((results.taxiFare.distance)/1000)//公里}});driving.search(p1,p2);}catch(e){console.warn(e,'e')}},handleAddressChange(){constBMap=this.BMap;如果（！BMap）返回；constp1=newBMap.Point(Longitude1,Latitude1);constp2=newBMap.Point(Longitude2,Latitude2);this.getDistance(p1,p2)}}