qart 图形二维码 html2canvas下载二维码

效果图
灰白

彩色

前端代码

<!DOCTYPE html>
<html lang="zh" xmlns:th="http://www.thymeleaf.org">
<head><meta charset="UTF-8"><th:block th:include="include :: manhua('二维码')"/><th:block th:include="include :: cartoon-qrcode-css"/>
</head>
<body>
<div class="jq22-container"><div id="combine"></div><div class="jq22-content "><input id="file" type="file"><label>黑白:<input type="radio" value="threshold" name="filter" checked>&nbsp;&nbsp;彩色:<input type="radio" value="color" name="filter"></label><p><button class="btn btn-success " type="button" onclick="$('#file').click();"><i class="fa fa-upload"></i>&nbsp;&nbsp;<span class="bold">上传</span></button><button class="btn btn-info " type="button" onclick="saveCanvas()"><i class="fa fa-paste"></i>下载</button></p><a href="" download="二维码.png" id="download"></a></div>
</div>
</div>
<th:block th:include="include :: manhua-footer"/>
<th:block th:include="include :: cartoon-qrcode-js"/>
</body>
</html>

css 有些是用的 bootstrap 自行去下载吧也没有用多少，可以自己定义css

body {font-family: "open sans", "Helvetica Neue", Helvetica, Arial, sans-serif;font-size: 13px;color: #676a6c;overflow-x: hidden;
}.jq22-container {width: 200px;height: 100%;margin: 0 auto;
}button {height: 30px;width: 48%;margin: 0 auto;
}
#file {display: none !important;opacity: .01;
}

js代码

$(document).ready(function () {var value = 'http://www.aikan21.com';var filter = 'threshold';var imagePath = '/img/qrcode.jpg';function makeQArt() {new QArt({value: value,imagePath: imagePath,filter: filter}).make(document.getElementById('combine'));}$('#file').change(function () {getBase64(this.files[0], function (base64Img) {var regex = /data:(.*);base64,(.*)/gm;var parts = regex.exec(base64Img);imagePath = parts[0];makeQArt();});});$('input[type=radio]').click(function () {filter = $(this).val();makeQArt();});function getBase64(file, callback) {var reader = new FileReader();reader.readAsDataURL(file);reader.onload = function () {callback(reader.result);};}makeQArt();
});
function saveCanvas() {html2canvas(document.getElementById("combine")).then(function (canvas) {var imgUri = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream");$("#download").attr("href", imgUri);console.log(imgUri);document.getElementById("download").click();});
}

html2canvas 下载二维码依赖
地址：http://html2canvas.hertzen.com/

二维码依赖：qart.min.js

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