wx-open-launch-weapp传参跳转前判断

原理：页面元素被wx-open-launch-weapp覆盖，
判断参数是否存在，不存在不显示wx-open-launch-weapp，
绑定函数判断是否可以跳转提示相应的信息

<div style="width:100%;display: flex;position:relative;" @click="LYJshow()">
           
   <img src="static/img/leyouji.png" /> <!--显示图片-->
   
     <wx-open-launch-weapp             
       v-show="showLYJ"      <!--控制显示-->
       id="launch-btn"
       username="gh_c94226000001"
       :path="path"
       style="position: absolute;top: 0;left: 0;bottom: 0;right: 0;overflow: hidden;z-index:1;">
       <script type="text/wxtag-template">
         <div style="width: 100px;height: 100px;">
         </div>
       </script>
     </wx-open-launch-weapp>
     
  </div>

//设置参数存在与否
that.showLYJ = false;
if(personInfo.seqCode){
  that.path ="/ticket/new_ticket.html?source=1&userId="+personInfo.seqCode
  that.showLYJ = true;



LYJshow(){
		//判断参数存在
        console.log(this.showLYJ);
        if(this.showLYJ){
          return
        }else {
          
        }
      },

}