<!DOCTYPE html>
<html lang="zh_CN">
<head>
<meta charset="UTF-8">
<title>二维码制作 - 在线工具 - OKTools</title>
<meta name="keywords" content="二维码,二维码制作,二维码生成,二维码图片">
<meta name="description" content="在线二维码制作工具,二维码制作,二维码生成,二维码图片">
<link rel="shortcut icon" href="../static/favicon.ico">
<link rel="stylesheet" href="../static/css/style.css" type="text/css">
<style>
.select {
flex-shrink: 1;
width: 100%;
}
.options {
width: 200px;
margin: 0 24px;
}
#input_size {
max-width: 111px;
}
.image {
width: 280px;
height: 280px;
background-color: #f3f3f3;
clear: both;
display: block;
margin: auto;
}
</style>
</head>
<body>
<main>
<div class="container">
<h1>二维码制作</h1>
<div class="flex mt-2" style="justify-content: flex-end;">
<div style="flex-grow: 1">
<div class="control">
<textarea id="area_text" class="textarea fixed-size" rows="10" maxlength="200"
onfocusin="onInputText(this)" placeholder="二维码内容"
onpaste="setTimeout(generate, 1)"></textarea>
<p id="text_help" class="help text-info">字数越多，越不易扫描</p>
</div>
</div>
<div class="options">
<div class="group fullwidth">
<span class="static">尺寸(px)</span>
<input id="input_size" class="input" type="number" value="280"
oninput="if(value>1000)value=1000">
</div>
<div class="group fullwidth mt-2">
<span class="static">纠错等级</span>
<select id="select_level" class="select">
<option value="2">H : 高</option>
<option value="3" selected>Q : 中等</option>
<option value="0">M : 低</option>
<option value="1">L : 最低</option>
</select>
</div>
<div class="group fullwidth mt-2">
<span class="static">背景颜色</span>
<input id="input_bg" class="input" type="color" value="#ffffff">
</div>
<div class="group fullwidth mt-2">
<span class="static">前景颜色</span>
<input id="input_fg" class="input" type="color" value="#000000">
</div>
<button class="button primary fullwidth mt-2" onclick="generate()">生成二维码</button>
</div>
<div>
<figure id="img_qrcode" class="image"></figure>
<button class="button fullwidth mt-2" onclick="save()">保存图片</button>
</div>
</div>
<div class="content mt-2">
<h2>二维码原理</h2>
<p>二维条码/二维码可以分为堆叠式/行排式二维条码和矩阵式二维条码。
堆叠式/行排式二维条码形态上是由多行短截的一维5条码堆叠而成；
矩阵式二维条码以矩阵的形式组成，在矩阵相应元素位置上用“点”表示二进制“1”，
用“空”表示二进制“0”，“点”和“空”的排列组成代码。</p>
<h2>数据表示方法</h2>
<p>深色模块表示二进制“1”，浅色模块表示二进制“0”。</p>
<h2>纠错能力</h2>
<ul>
<li>level L : 约可纠错7%的数据码字</li>
<li>level M : 约可纠错15%的数据码字</li>
<li>level Q : 约可纠错25%的数据码字</li>
<li>level H : 约可纠错30%的数据码字</li>
</ul>
</div>
</div>
</main>
<script src="../static/js/qrcode.min.js"></script>
<script>
let img_qrcode = document.getElementById('img_qrcode');
function generate() {
img_qrcode.innerHTML = '';
img_qrcode.style.visibility = 'hidden';
let area_text = document.getElementById('area_text');
if (!area_text.value) {
area_text.classList.add('error');
return
}
let size = parseInt(document.getElementById('input_size').value);
if (size <= 0 || size > 1000) {
return;
}
try {
new QRCode(img_qrcode, {
text: area_text.value,
width: size,
height: size,
colorDark: document.getElementById('input_fg').value,
colorLight: document.getElementById('input_bg').value,
correctLevel: parseInt(document.getElementById('select_level').value)
});
setTimeout(() => img_qrcode.style.visibility = 'visible');
} catch (e) {
document.getElementById('area_text').classList.add('error');
let text_help = document.getElementById('text_help');
text_help.classList.add('text-error');
text_help.innerText = '内容过多'
}
}
function onInputText(e) {
e.classList.remove('error');
let text_help = document.getElementById('text_help');
text_help.classList.remove('text-error');
text_help.innerText = '字数越多，越不易扫描';
}
function save() {
let img = img_qrcode.getElementsByTagName('img')[0];
let url = img.src;
let a = document.createElement('a');
let event = new MouseEvent('click');
a.download = 'qrcode_' + Math.round(new Date() / 1000);
a.href = url;
a.dispatchEvent(event)
}
</script>
</body>
</html>
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