问题描述
我正在开发一项功能,该功能将允许用户执行其管道的最后阶段并从中获得精美的 PDF。
我的服务器和客户端都运行良好。我一直无法完成的是将整个文档转换为 pdf。它只捕获了一小部分。
我不需要多个页面,虽然那会很好。无论渲染多长时间,我只想捕捉所有内容。可能有 100 个项目,例如图像和旁边的复选框。我需要一份完整的 pdf 文件,目前我只能得到其中一小部分的快照。
我尝试使用高度选项和各种包,但绝对没有运气。
我将提供 renderSimpleForm 最终在浏览器上的外观。以及它以 PDF 格式显示的内容。
import { jsPDF } from "jspdf";
import * as htmlToImage from 'html-to-image';
const handleSubmit = () => {
// //Before sending the action show in progress text and disable button
setPdf({inProgress: true})
//Creating the pdf blob
htmlToImage.toPng(document.getElementById('simpleForm'))
.then(function (dataUrl) {
var link = document.createElement('a');
link.download = 'my-image-name.jpeg';
const pdf = new jsPDF('p','mm','a4');
const imgProps= pdf.getimageProperties(dataUrl);
pdf.addImage(dataUrl,'PNG',0);
//Send action to server
ClassInstancesActions.StorePassportPDFTodisk(pdf.output('blob'),productID)
});
}
return (
<div id="simpleForm" style={{ height: '9999px !important',width: '9999px !important' }}>
{renderSimpleForm()}
{showError()}
{renderSubmitCancel(disableSubmit)}
</div>
);
};
解决方法
好的,一段时间后我有一个解决方案可以满足我的需求:
- 指向 React 组件中的一个 div,然后将其 pdf 化
- 保留样式
和额外的:
- 能够以编程方式自定义和控制数据库中的元数据
- 定制是添加页眉、页脚、页码、首页,我可以在技术上控制每一页
我使用了 https://www.npmjs.com/package/@progress/kendo-react-pdf
我使用了它的 savePDF 函数,它允许我也有一个模板创建类型的功能,因为它是免费的,并且作为一个 prop 在你将在代码中看到的 options 参数中传递。
还有一个 css 选择器,它只针对已传递的 PDF 化 div,无需指定要显示的内容和不显示的内容,因此您可以在 PDF 完全从这里出来之前实际操作它。
>在视频演示中,您会看到我有一个超过 40 页的 MASSIVE div! 保留了我的材料和 css 样式,我可以随意添加任何我想要的。 我什至加了水印!
希望这对人们有所帮助!
//component that has the div i need pdf'ed
//
var reactToPdfUtils = require('../../../../../reactToPdf.js');
const handleSave = (sourceElement) => {
console.log('handleSave in SFV!');
reactToPdfUtils.useSavePDFNOW(pdfProps,cb,sourceElement)
function cb(sendDataContent){
console.log(sendDataContent)
}
};
//////////////////////////////////////////////////////////////////////////////////////////////
//reactToPdf.js file that houses the library function I manipulate to get the result
import React,{ useEffect } from 'react';
import { savePDF } from '@progress/kendo-react-pdf';
import { drawDOM,exportPDF } from '@progress/kendo-drawing';
export const useSavePDFNOW = (pdfProps,sourceElement) => {
//pdfprops i pass in from meta data in my mongoDB,//I made a cb to let me know when the funtion is done
//I also do elaborate checking here myself for example
//to make sure there is only one div that that id
//create a template
//this function is declared then passed in later to savePDF,//the magic in the library allows you to manipulate each page if you wanted. You can do some //cool stuff here.
try {
const onEveryPage = (props) => {
if (hasAfirstPage) {
if (props.pageNum === 1) {
document.querySelectorAll('#toPDF')[0].style.cssText = 'margin-top: -188.333px;height:100%;';
// document.querySelectorAll('kendo-pdf-page')[0].style.cssText = '';
return <Fragment></Fragment>;
} else {
return (
<div style={{ zIndex: '-999999',justifyContent: 'center',display: 'flex' }}>
<div id='header' style={{ textAlign: 'center',fontSize: headerFontToUse + 'px',backgroundRepeat: 'no-repeat',backgroundSize: '100%',backgroundColor: 'transparent',height: headerHeightToUse,width: headerWidthToUse,backgroundImage: `url(${headerSrcToUse})`,position: 'absolute',top: 10 }}>
{headerTextToUse}
</div>
<div id='watermarkImage' style={{ backgroundRepeat: 'no-repeat',height: waterMarkHeightToUse,opacity: 0.5 /* Firefox,Chrome,Safari,Opera,IE >= 9 (preview) */,backgroundImage: `url(${waterMarkSrcToUse})`,bottom: -90,left: 300 }}></div>
<div id='pageNums' style={{ position: 'absolute',bottom: 0,right: '10px' }}>
Page {props.pageNum} of {props.totalPages}
</div>
<h6 id='footer' style={{ fontSize: footerFontToUse + 'px',margin: '6 auto' }}>
{footerTextToUse}
</h6>
</div>
);
}
} else {
return (
<div style={{ zIndex: '-999999',display: 'flex' }}>
<div id='header' style={{ textAlign: 'center',top: 10 }}>
{headerTextToUse}
</div>
<div id='watermarkImage' style={{ backgroundRepeat: 'no-repeat',left: 300 }}></div>
<div id='pageNums' style={{ position: 'absolute',right: '10px' }}>
Page {props.pageNum} of {props.totalPages}
</div>
<h6 id='footer' style={{ fontSize: footerFontToUse + 'px',margin: '6 auto' }}>
{footerTextToUse}
</h6>
</div>
);
}
};
//MaterialUI font fixing may have to do this elsewhere too specific
parentWrapper.querySelectorAll('[class*=MuiTypography],[class*=Text],[class*=formControl]').forEach(function (el,i) {
el.setAttribute('style','color: black; overflow: visible');
});
//save pdf on client side,send blob to dev to figure out what he or she wants to do with it
let pdfBlob;
savePDF(
parentWrapper,{
pageTemplate: onEveryPage,paperSize: 'a4',fileName: 'Testing',keepTogether: '.menu',scale: 0.6,title: 'Ametek/Powervar Passport',margin: { top: marginTopToUse,bottom: marginBottomToUse }
},() => {
// Server side rendering tested comes out exactly the same so long as the props match
drawDOM(parentWrapper,{ pageTemplate: onEveryPage,paperSize: 'A4',margin: { top: 180,bottom: 10 } })
.then((group) => {
return exportPDF(group);
})
.then((dataUri) => {
// Send action to database
pdfBlob = dataUri.split(';base64,')[1];
ClassInstancesActions.StorePassportPDFToDisk(pdfBlob,'testing');
cb(pdfBlob);
parentWrapper.remove();
});
}
);
} catch (error) {
console.log(error);
}
};
//This is in a style sheet
//i have a div within the div I pdf with an id of #divToDisableInteraction
//As long as there in there you can do any css magic to your pdf document here
//I tested this to high heaven you can get most things done here
//including adding an image url
kendo-pdf-document #divToDisableInteraction {
visibility: hidden;
}