<template>
 <div class="pdf_wrap">
  <div class="pdf_list">
   <!-- src:pdf地址，page: 當前顯示頁 -->
   <pdf v-for="i in numPages" :key="i" :src="src" :page="i" style="width: 100%" > </pdf>
  </div>
  <Button type="info" @click="loadPdf(pdfUrl1)">
   文件1
  </Button>
   <Button type="info" native-type="submit" @click="loadPdf(pdfUrl2)">
   文件2
  </Button>
 </div>
</template>
 
<script>
import pdf from 'vue-pdf'
import { Button } from 'vant'
export default {
 components: {
  pdf, Button
 },
 data () {
  return {
   src: '',
   numPages: undefined,
   pdfUrl1: 'https://clinic-trial-attachments.oss-cn-beijing.aliyuncs.com/output/demo.pdf/1.pdf',
   pdfUrl2: 'https://clinic-trial-attachments.oss-cn-beijing.aliyuncs.com/output/123demo'
  }
 },
 mounted () {
  this.loadPdf(this.pdfUrl1)
 },
 methods: {
  loadPdf (url) {
   this.src = pdf.createLoadingTask(url)
   this.src.promise.then(pdf => {
    this.numPages = pdf.numPages // 這里拿到當前pdf總頁數(shù)
   })
  }
 }
}
</script>
<style scoped>
 .pdf_wrap {
  background: #fff;
  height: 100vh
 }
 .pdf_list {
  height: 80vh;
  overflow: scroll;
 }
 button {
  margin-bottom: 20px;
 }
</style>