項目需求:打印手機端測試結果為測試報告
思路:以id為索引構建canvas,實現打印
方案:使用已封裝好的組件:html2canvas、jspdf,實現html轉canvas以及生成pdf
1.npm所需依賴:
npm install --save html2canvas
npm install jspdf --save
2.定義全局函數,在main.js中引入,或者直接寫在main中
import html2Canvas from 'html2canvas' import JsPDF from 'jspdf' export default{ install (Vue, options) { Vue.prototype.getPdf = function () { var title = this.htmlTitle html2Canvas(document.querySelector('#pdfDom'), { allowTaint: true }).then(function (canvas) { let contentWidth = canvas.width let contentHeight = canvas.height let pageHeight = contentWidth / 592.28 * 841.89 let leftHeight = contentHeight let position = 0 let imgWidth = 595.28 let imgHeight = 592.28 / contentWidth * contentHeight let pageData = canvas.toDataURL('image/jpeg', 1.0) let PDF = new JsPDF('', 'pt', 'a4') if (leftHeight < pageHeight) { PDF.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight) } else { while (leftHeight > 0) { PDF.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight) leftHeight -= pageHeight position -= 841.89 if (leftHeight > 0) { PDF.addPage() } } } PDF.save(title + '.pdf') } ) } } }
3.在需要導出pdf的頁面,給元素id為pdfDom(可在上方代碼處修改,一一對應即可)
<view > <view id="pdfDom"> <view class="" > 首頁 </view> <image src="../../static/BasicsBg.png" mode="widthFix" class="response"></image> </view> <button type="button" class="btn btn-primary"v-on:click="getPdf()">導出PDF</button> </view>
注意:
1.頁面data中需包含htmlTitle(導出文件名)
2.id節點中不可包含網絡圖片地址,包含網絡地址搜索說是要使用img的onload方法,等待圖片加載完
3.參考文檔:”https://blog.csdn.net/weixin_44089042/article/details/115379621
https://blog.csdn.net/weixin_30668887/article/details/98822699“