导入html2canvas和jspdf插件到项目中
npm install html2canvas
npm install jspdf
引入html2canvas和jspdf到jsx中
import jsPDF from 'jspdf'
import html2canvas from 'html2canvas'
定义一个div和需要生成pdf的页面
<div id="demo">
<div style={{marginTop:15}}>
<div>
尊敬的用户:
</div>
<div>
依托本系统管理节能,本月共计发生计划外事件0起,有效介入管控事件0起,累计管控收益0元。
</div>
</div>
</div>
定义一个触发生成报告的按钮
<Button onClick={download}>
生成报告
</Button>
实现download方法
const download = () => {
let title = 'dfghdfh'
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');
console.log(PDF)
})
}
}