The premise is to download and introduce requirements first
1. Download: npm install vue-pdf --save-dev
2. Import: import pdf from "vue-pdf";
1. Preview:
// data为后端给的base64格式的pdf
import { data } from "../../tempData";
import pdf from 'vue-pdf'
// 解决部分文字不显示的问题
import CMapReaderFactory from 'vue-pdf/src/CMapReaderFactory.js'
// html
<pdf v-for="i in numPages" :key="i" :src="src" :page="i" ref="myPdfComponent"></pdf>
data () {
return {
src: '',
numPages: 0,
page: 1,
currentPage: 0
};
},
components: {
pdf
},
mounted () {
let da = data.fileToBase64
let datas = 'data:application/pdf;base64,' + da
this.src = pdf.createLoadingTask({ url: datas, CMapReaderFactory });
this.src.promise.then(pdf => {
this.numPages = pdf.numPages;
});
},
2. Download:
//base64 转换 blob
dataURLtoBlob(dataurl) {
var bstr = atob(dataurl)
var n = bstr.length;
var u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: 'pdf' });
}
// res.data 就是后台返回的base64的 文件流
let URL = this.dataURLtoBlob(res.data);
var reader = new FileReader();
reader.readAsDataURL(URL);
reader.onload = function (e) {
// 兼容IE
if (window.navigator.msSaveOrOpenBlob) {
var bstr = atob(e.target.result.split(",")[1]);
var n = bstr.length;
var u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
var blob = new Blob([u8arr]);
window.navigator.msSaveOrOpenBlob(blob,'采购单.pdf');
} else {
// 转换完成,创建一个a标签用于下载
const a = document.createElement('a');
a.download = '采购单.pdf'; // 这里写你的文件名
a.href = e.target.result;
document.body.appendChild(a)
a.click();
document.body.removeChild(a)
}
}
Reprinted in: vue convert base64 file stream to pdf and download, compatible with IE10+ vue-pdf preview base64 data as pdf