这篇文章(https://www.tpketang.com/article/101.html)适合没有图片的，那么有页面中有图片呢?
尽量用https协议
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>html2canvas Example</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.3.2/html2canvas.min.js"></script>
<script type="text/javascript" src="/static/index/js/jquery-3.4.1.min.js"></script>
<script type="text/javascript"
src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/jspdf/1.0.272/jspdf.min.js"></script>
</head>
<body>
<div id="capture" style="padding: 10px; background: #f5da55">
<img
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TAPtokAQ3BVtfrvu+dwYjI5DG7p67q3utW+eX5+FkLosm4ABCEAQQhAEAIQhAAEIQBBCEAQAhCEAAQhAEEIAQhCAIIQgCAEIAgBCEINAvL09MQoXqfhwuvhg3+7XHi9MIR/NI4jgFQKwSBpd/r+39XfRWhZff23gmYGEAApEYb96fV9IAQeeOYVODOAAEguIL5V8Ps2DQyAlAXFtwbeyyLpxwmUGUAAxAtFCbYJWAAEKAqBZVJFnTIAwULlyiyPNYACIOnB+LYK3ei1ppUFA5COABkkfdefdQr096ryeAIGQBoGZHcCY+Ced+WUA4C0BQgVI1azpIcSMgqA+HUgfLdbTQDEZ6d+ch+3DQqAtGWnltWXJP1+898uvRdJ+mf1/VBohlok3W1tuwDkOu1PcJQyq579+vrPqElAer9beFfI+z4ASFmA5K4a5xtjVt41gzMkuYGZT9UEQAoAZDhljaFDIL4yNoOOW2f2GSaNh9TjAyCf66BtO1STjtvGpwrD9Lq67DeEJKnlApD8lmpzX70hLPcbjeGsROsmAJIPjmQXtUBYttiPtihBlwtA3l/MX4n/H+c9R62DcWls94ktazgkAPJHO6Vd+HtszEaVCsqiwI2PAJIejl6sVElWNizXAUi6xb9FG7QhG9C5mgwlQtI7IIdEpR47VY7tcl2LngFJAQd2qkzbZYakV0BSZA6qRtnVxHR9egQkGg6yRjpQIrf4LDJ0t3oDJBqOWRttmusYkshFxqsns54AGRS7CIilqtNyLbpiMbEXQKLhuMNSba5DDkh6AeSn4jojwJFPkRZ5kXQLIHEzD2G8vfA+na5pt4BEzTjA0S4kD/qks9UyIFG540ulGFULyad5pGVAInLHl8Mcqh6S254AicodJQbynV4f7QMkMU7hYtu+RUCickdJcJxnyfVMOZ8uKrkoDpJ317xFQH4FlNxS4PgK7L0+ofhWe/kfW3hntVoDJMJalQLHNbMikMRd/0mr1m9LgESU2VeDk1nfdd0epEmVfGpTYeN2qYq8tPRbAsTbtfqwk5FJloGbxfMog/ydrfnkJJoBJCKYlxTKPdUQSGLcxJ2kuRVAvMG8tHau9wIDiT+0L5JuWwDEG8xeymlh8kIPJP488jiO46F2QJ69s0ShF9cL/vn99bwTwJtHFkl34zgutQLivYlK37oesabTOyReqzWN4/hQKyCeH16qtYqcAYHkKE+HcxnH8bZGQLwzw20lN8xOMR8t3TMkg3xNj4dxHKfaAPHYj9qeJweSvJkuWRVJBYinepQczIGkXLuapIqkAsRTPWp+ppxMki+wJ6kiKQDpsXqkgKSmHBY5dp6jTe/GcZxLB8TTkfj0+WMgoYr8RfM4jnelA+L5gTd46u4h8YxbuM2KBsRDfyvVIxUkLY5PiioSGtajAfHYq5tGLzaQ2MbMvFs60mZFA2L9Ya2fowsk18uzkTEsrEcC4imLvXjsX0CySRUJ2+UbCYj14k8q5zHamiDp4fR6q2UPC+tRgOxkf2Kwp/AJJNuF9RCbFQWI543cqE95HxbqAZLsNisKEOvF7s1eAcl2NiukmxUFiNUy9GivgGQbmxWSQyIA8eSPGyEgSWez3DkkAhAr4b3bq7c6KOZA7xYhsdosdw6JAMQ6+2Gv0kIyqZ21Jeu4uHNIBCDW/NHbLlUgsctq4905xAXI09OTxx+SP4Ck+BziBYT8ASSl5xDX7l4vINaLSP7YFpJZ9Z/iaB0LV1D3AmIN6OQPINkqh7iCuhcQAvp2kNzLv3+rZkisOaRKQAjoQGKR5WZ1dbK8gFg/ROaO+z0rJIvqPFbIGtRvrQdcmwFxbDGZRAcLSLYFxNzq9QCyl63F28ODPlsE1h5PcbQ2LMytXg8g5l9WtHiBxCbzpGxt9eYApOajRYEk//v9WQsgrIG0Bcms8rtb5txr/ZAdAGlDg2KOFSo9Hw6yrYUACIr9/PHGADEvFnoAsbbcWCQsG5IbAAGQlgHxfJTZovI/fuK5FkDYZtIWHDVYLCsg5u0mWwNSwwzVKxw1hHTJdoJOFkAsFgtA4rWT/VSZ2qpHVRaLDNIOHIvqWU0HELQ5HA+qZ3dDNYCwDtIGHDVZXmvWYqEQOJqHozpADmKzInDU8f4BBDi+7sdV7xOde3Ww3Z3nQba7MVqCozpArDMaTxQCh1Xmc6BzPFFoBaSFCwUcdQGS5dAGa0eh1oAIHPllPodtc0BOkLAfq6yZsvVqbbpZx3E0L057ATGfUyTWQoDjOlkdS9aTFa0Xk1ZvWjgmtXf2mNVymtdAIgA5yHjituhkAcc245P1dPed6GRFyGpVe4HDE9Czfj6I1RcS1OPhaL0qW29UcwfLDYgzqJND4uBofXeCNX+4Oli5Aek9hwBH+vzhCuhRgFjp7jmHAEcF+SMKEHJIHjh6sqhZ8kcUIC7C1dfOXuCoKH9EAmK98L3YrOF0kYFju0nFnT8iAbFSvqiuAwOAox575c4fkYBYc4jUdjcLODLZq4j8EQkINgs4UsiabUPsVTQgHtpbuwE8FRU4jtrJ/gx+iL2KBsRzU0xqZw9RFBw95LPP5Nm8GWKvogHx2KxFdX5uN3CUF87D7FUKQDxlsfYq4nnvwBFXPcLsVQpAPDPoonpX1oGjjOoRsjiYEhCPzZLqXFmPhKMFm+nVQbaH8MLtVSpAeqoikXDwfMxR1tauJN2N4ziXDoi3itSycBgZyIHDXz1chzNsDYhnZq3FakQ8Qz6LR4+jJpzw6pESEG8VmVR+R+sZOELluV+SVI/UgOzlOxmw5BVk72wHHLFZLrS1uxUgg3x7kUr25p4LChyx1SO8tbsVIBFVpOS2r6XbAhwJ7pFU1WMLQIbT7DAYf3zJgf3akA4c8VY1afXYApCIGaJUq3UN/MCRwFopUedqa0AiBqLUtZG9jn37zyCZ1O5phx4dZF/zeJl0xnFUC4B4S+micvcoDacLvXsDyiTph9hXFd3keKkeOrZ3mwDE4tlryiNrWCT2UyXNHeuq3BIgEQODlyd3SNLNKqQ3A0hEYC85j6D0LkJ60/pvDZBBMQcZAEl/ofyig2gNkCirBST9hfKXYN46IFFWaxFP33UNR8uARPlRIOkDjnfWqgdABvm2oawh4VHV8hRlpRd9spOiZUCiB5FK0l7l+NBa9QJIVB45Q/KD4N4UHH9txPQASFQeAZL8iprsPs0dPQIyKO6g5y/NPChcB/nXOa6CoydAIkM7kGyvKAfw11DeMyApIFlEhyulsl+v3gA5D/qvwJ9HLinfUp119UEdPQKSAhIsV+y1icyLZjh6BkSK7YisqwnrJXbtFNfCdcPROyCpIJGO26UfySZXVY1vgUE8BA4ASWe3yCZ5s0YIHADyGpLIbgm262t26nvpYw4g20Bytl0cspAuhCeZkABkW0jOF/BR9X2QT8kVYz22oWecAci2gbHHjHKQdJ8YDCnRgRsA8jEk+4Th8RIoc0P2a8vxkxKuQQFIfltwCZZJ9bWIz1DcbzxeSRsgAFKO5aqxsuSAIqmlApA6LMMlWGZJvzMDcx6Hf5WuC5XVUgGI/wZJ3eX6KjDnr//eQBTxHs/28vw6NxCbWSoAqb+afBWe9fdn/V69/ucNECoEguxVA0DiQPle+E3VghZlfOYGQPw6V5OBezlJk+KQ85cAkD5sV20q5tkaAIkHJUdLuCUwJhW0BgQgVBTAABBAIWMASA2g5FhxBgwAqQqU4QTKvkMoZlW2IRNA8sKy03GVulVYJh1X+qda3wCAlAXLvepeeFz0Z/vLoYULAyBlwqJKqssaiOrsE4C0aceGjFWmeSAApL3AP5zAeft3VgCk17uEuwABQPqF6KPvlzd/ohoBQahlAQhCAIIQgCAEIAgBCEIAghCAIAQgCAEIQgCCEFrr/wEABx0h6feFjH4AAAAASUVORK5CYII="
alt="Example Image" style="width: 100px;">
<p>Hello, this is a sample text.</p>
</div>
<button onclick="capture()">Capture</button>
<script>
function capture() {
const element = document.getElementById('capture'); // 指定需要生成图片的DOM元素
html2canvas(element, {
allowTaint: true,
foreignObjectRendering: true
}).then(canvas => {
console.log(canvas)
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一页pdf显示html页面生成的canvas高度;
var pageHeight = contentWidth / 841.89 * 592.28;
//未生成pdf的html页面高度
var leftHeight = contentHeight;
//页面偏移
var position = 0;
//a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
//var imgWidth = 595.28;
//var imgHeight = 592.28/contentWidth * contentHeight;
var imgWidth = 841.89;
var imgHeight = 841.89 / contentWidth * contentHeight;
var pageData = canvas.toDataURL('image/jpeg', 1.0);
//l表示横版，p：纵向 （默认纵向）
var pdf = new jsPDF('l', 'pt', 'a4');
//有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
//当内容未超过pdf一页显示的范围，无需分页
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;
position -= 595.28;
//避免添加空白页
if (leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save("mood_board.pdf");
// 将pdf输入为base格式的字符串
var buffer = pdf.output("datauristring")
// 将base64格式的字符串转换为file文件
var myfile = dataURLtoFile(buffer, "mood_board.pdf")
name = upload_pdf(myfile)
})
}
upload_pdf = function (file) {
var order_id = 1;
var formdata = new FormData()
formdata.append("file", file); // 文件对象
formdata.append("order_id", order_id);
//多个参数的情况
// formdata.append("name", name);
var msg = '';
// 之后ajax传递数据
$.ajax({
url: "/index/upload", //url地址
type: 'POST', //上传方式
data: formdata, // 上传formdata封装的数据
dataType: 'JSON',
cache: false, // 不缓存
async: false, // 开启的异步 保证返回信息
processData: false, // jQuery不要去处理发送的数据
contentType: false, // jQuery不要去设置Content-Type请求头
success: function (data) {
if (data.status == 0) {
//var url= data.url;
//跳转pdf界面 uploadUrl为服务器地址
window.open(uploadUrl + url)
} else {
layer.alert("文件上传失败");
}
},
error: function (data) { //失败回调
layer.msg('数据不能为空', { icon: 5 });
console.log(data);
}
});
//返回值
//return url;
};
//将base64转换为文件对象
function dataURLtoFile(dataurl, filename) {
var arr = dataurl.split(',');
var mime = arr[0].match(/:(.*?);/)[1];
var bstr = atob(arr[1]);
var n = bstr.length;
var u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
//转换成file对象
return new File([u8arr], filename, { type: mime });
//转换成成blob对象
//return new Blob([u8arr],{type:mime});
}
</script>
</body>
</html>
