vue嵌入本地iframe文件并获取某元素的值方式

<template>
 <div>
  <iframe
   name="iframe"
   id="iframe"
   width="100%"
   height="470px"
   v-bind:src="HtmlPath"
   frameborder="0"
   scrolling="no"
   ref="iframeDom"
  ></iframe>
 </div>
</template>

callchild(){
				 let obj1=window.frames["iframe"];//获得对应iframe的window对象
				 obj1.fn() //执行iframe 里的方法
				 console.log(obj1.document.getElementById().value) //获取iframe里定义id元素的值
			}

<iframe id="displaypdfIframe" :src="pdfUrl" width="100%"   ref="pdfframe"></iframe>
$('#displayPdfIframe').on("load",function(){
    vm.iframeWin = vm.$refs.pdfframe.contentWindow
    console.log(vm.iframeWin)
})

this.textlayer = that.iframeWin.$('.textLayer')

var selection_text = this.iframeWin.window.getSelection().toString();