vue-pdf-embed预览PDF

一、vue-pdf-embed

链接：Yarn

1、安装插件

npm install vue-pdf-embed

2、文件中引入（分页效果已实现，样式请自行修改）

<template><div class="download-pdf-preview" style="height: 450px; border:10px solid #D4D4D7;overflow: hidden; overflow-y: scroll"><!-- <vue-pdf-app style="height: 430px;" :pdf="pdfURL"></vue-pdf-app> --><vue-pdf-embed ref="morePDF" :source="pdfURL" :page="currentPage" ></vue-pdf-embed><div class="ins-pdf-button-box"><span @click.stop="prePage">上一页</span><span>{{currentPage}}/{{pages}}</span><span @click.stop="nextPage">下一页</span></div></div><div style="text-align: right; margin-top: 10px;"><Button type="text" v-if="back" style="color: #FF7D48; width: 100px;" @click="handleBack()">返回列表</Button><Button style="color: #FF7D48; width: 100px; border-color: #FF7D48;" @click="handleDownload()">下载</Button></div>
</template><script>
import {downloadBlob,base64ToBlob,blobToUrl} from '@/utils/index.js'
import VuePdfEmbed from "vue-pdf-embed"export default {components: {VuePdfEmbed},emits : ['on-back'],props : {info : {type : Object,default : {}},back : {type:Boolean,default : false}},data(){return {	pdfURL : ''	,//PDF URLpages: [],numPages : 0,		//分页currentPage : 1, //当前显示页数}},computed : {},watch: {info : {handler(data) {if(data?.base64Str){const blob = base64ToBlob(data.base64Str);  this.pdfURL= blobToUrl(blob)}},deep: true,immediate: true}},methods : {//返回列表handleBack(){this.$emit('on-back')},//下载handleDownload(){downloadBlob(this.pdfURL,this.info.fileName)},async getPDFnums(url) {const page = await VuePdfEmbed.getDocument(url).promisethis.pages = page.numPagesthis.currentPage = 1},// 上一页prePage() {var page = this.currentPagepage = page > 1 ? page - 1 : this.numPagesthis.currentPage = page},// 下一页nextPage() {var page = this.currentPagepage = page < this.numPages ? page + 1 : 1this.currentPage = page}},created(){},mounted () {}
}	
</script><style>
</style>

3、插件支持PDF地址，base64或二进制数据需要生成PDF地址

// PDF base64 转地址
export function base64ToBlob(base64Data){const binary = atob(base64Data);  const len = binary.length;  const buffer = new Uint8Array(len);  for (let i = 0; i < len; i++) {  buffer[i] = binary.charCodeAt(i);  }  return new Blob([buffer], { type: 'application/pdf' });  
}// PDF base64 转地址
export function blobToUrl(blob) {  return URL.createObjectURL(blob);  
}

4、插件支持预览CA电子签名及腾讯电子签名，可兼容PC和移动端的PDF预览。 

注意：如果安装完毕并正确引用后无法加载PDF文件，且控制台无报错原因，请降低改插件的版本例：1.2.1