在大多数项目中都会遇到在线预览PDF文件,项目使用的是element ui,使用vue-pdf实现。
npm install --save vue-pdf
参数介绍:
<template> <div> <el-row> <el-button @click="onPreview" size="small">预览</el-button> </el-row> <el-dialog title="预览合同附件" :visible.sync="viewVisible" center width="60%" @close='closePreview'> <el-row :gutter="20"> <span>共{{pageCount}}页, 当前第 {{pdfPage}} 页 </span> <el-button type="text" size="mini" @click.stop="previousPage">上一页</el-button> <el-button type="text" size="mini" @click.stop="nextPage">下一页</el-button> </el-row> <div> <pdf :src="src" :page="pdfPage" @num-pages="pageCount = $event" @page-loaded="pdfPage = $event" style="display: inline-block; width: 100%"></pdf> </div> </el-dialog> </div> </template> <script> import pdf from 'vue-pdf' import store from '@/store/' export default { components:{ pdf }, data(){ return { viewVisible: false, src: null, pdfPage : 1, pageCount: 0, token: store.getters.access_token, } }, methods:{ onPreview(){ this.src = pdf.createLoadingTask({ url: 'http://localhost:8082/file/demo.pdf', httpHeaders: {Authorization:'Bearer '+ this.token} }); this.src.promise.then(pdf => { this.viewVisible = true; }); }, closePreview(){ this.pdfPage = 1; }, previousPage(){ let p = this.pdfPage p = p > 1 ? p-1 : this.pageCount this.pdfPage = p }, nextPage(){ let p = this.pdfPage p = p < this.pageCount ? p+1 : 1 this.pdfPage = p } } } </script>
1、URL
url为文件地址路径
this.src = pdf.createLoadingTask({ url: 'http://localhost:8082/file/demo.pdf', });
2、设置请求头
可以通过httpHeaders来设置token等参数
httpHeaders: {Authorization:'Bearer '+ this.token}
3、src
这点比较重要,网上很多帖子都是这样的
this.src.then(pdf => { this.viewVisible = true; })
会报错 TypeError: this.src.then is not a function
TypeError: this.src.then is not a function at VueComponent.onPreview (index.vue?6ced:241) at click (index.vue?aaff:261) at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854) at VueComponent.invoker (vue.runtime.esm.js?2b0e:2179) at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854) at VueComponent.Vue.$emit (vue.runtime.esm.js?2b0e:3888) at VueComponent.handleClick (element-ui.common.js?5c96:9413) at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854) at HTMLButtonElement.invoker (vue.runtime.esm.js?2b0e:2179) at HTMLButtonElement.original._wrapper (vue.runtime.esm.js?2b0e:6917)
正确的是这样的
this.src.promise.then(pdf => { this.viewVisible = true; });