392 lines
20 KiB
Markdown
392 lines
20 KiB
Markdown
# 介绍
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`uQRCode`是一款基于`Javascript`环境开发的二维码生成插件，适用所有`Javascript`运行环境的前端应用和`Node.js`应用。
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`uQRCode`可扩展性高，它支持自定义渲染二维码，可通过`uQRCode API`得到二维码绘制关键信息后，使用`canvas`、`svg`或`js`操作`dom`的方式绘制二维码图案。还可自定义二维码样式，如随机颜色、圆点、方块、块与块之间的间距等。
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欢迎加入群聊【uQRCode交流群】：[695070434](https://jq.qq.com/?_wv=1027&k=JRjzDqiw)。
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# 设计器
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uQRCode发布了配套的可视化设计器，可根据自己喜好在设计器中设计二维码样式，一键生成配置代码复制到项目中，详情请在微信小程序搜索“柚子二维码”，或扫描下方小程序码体验。
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## 设计器模板示例
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# 快速上手
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> 在`uni-app`中，我们更推荐使用组件方式来生成二维码，组件方式大大提高了页面的可读性以及避开了一些平台容易出问题的地方，当组件无法满足需求的时候，再考虑切换成原生方式。
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官方文档：[https://uqrcode.cn/doc](https://uqrcode.cn/doc)。
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github地址：[https://github.com/Sansnn/uQRCode](https://github.com/Sansnn/uQRCode)。
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npm地址：[https://www.npmjs.com/package/uqrcodejs](https://www.npmjs.com/package/uqrcodejs)。
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uni-app插件市场地址：[https://ext.dcloud.net.cn/plugin?id=1287](https://ext.dcloud.net.cn/plugin?id=1287)。
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## 原生方式
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原生方式仅需要获取`uqrcode.js`文件便可使用。详细配置请移步到：文档 > [原生](https://uqrcode.cn/doc/document/native.html)。
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### 安装
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1. 通过`npm`安装，成功后即可使用`import`或`require`进行引用。
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``` bash
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# npm安装
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npm install uqrcodejs
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# 或者
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npm install @uqrcode/js
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```
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2. 通过项目开源地址获取`uqrcode.js`，下载`uqrcode.js`后，将其复制到您项目指定目录，在页面中引入`uqrcode.js`文件即可开始使用。
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### 引入
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- 通过`import`引入。
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``` javascript
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// npm安装
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import UQRCode from 'uqrcodejs'; // npm install uqrcodejs
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// 或者
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import UQRCode from '@uqrcode/js'; // npm install @uqrcode/js
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```
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- `Node.js`通过`require`引入。
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``` javascript
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// npm安装
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const UQRCode = require('uqrcodejs'); // npm install uqrcodejs
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// 或者
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const UQRCode = require('@uqrcode/js'); // npm install @uqrcode/js
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```
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- 原生浏览器环境，在js脚本加载时添加到`window`。
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``` html
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<script type="text/javascript" src="uqrcode.js"></script>
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<script>
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var UQRCode = window.UQRCode;
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</script>
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```
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### 简单用法
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`uQRCode`基于`Canvas API`封装了一套方法，建议开发者使用`canvas`生成，一键调用，非常方便。以下是示例：
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- HTML示例
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- DOM部分
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``` html
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<canvas id="qrcode" width="200" height="200"></canvas>
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```
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- JS部分
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``` javascript
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// 获取uQRCode实例
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var qr = new UQRCode();
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// 设置二维码内容
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qr.data = "https://uqrcode.cn/doc";
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// 设置二维码大小，必须与canvas设置的宽高一致
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qr.size = 200;
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// 调用制作二维码方法
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qr.make();
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// 获取canvas元素
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var canvas = document.getElementById("qrcode");
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// 获取canvas上下文
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var canvasContext = canvas.getContext("2d");
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// 设置uQRCode实例的canvas上下文
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qr.canvasContext = canvasContext;
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// 调用绘制方法将二维码图案绘制到canvas上
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qr.drawCanvas();
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```
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- uni-app示例
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- Template部分
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``` html
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<canvas id="qrcode" canvas-id="qrcode" style="width: 200px;height: 200px;"></canvas>
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```
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- JS部分
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``` javascript
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onReady() {
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// 获取uQRCode实例
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var qr = new UQRCode();
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// 设置二维码内容
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qr.data = "https://uqrcode.cn/doc";
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// 设置二维码大小，必须与canvas设置的宽高一致
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qr.size = 200;
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// 调用制作二维码方法
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qr.make();
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// 获取canvas上下文
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var canvasContext = uni.createCanvasContext('qrcode', this); // 如果是组件，this必须传入
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// 设置uQRCode实例的canvas上下文
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qr.canvasContext = canvasContext;
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// 调用绘制方法将二维码图案绘制到canvas上
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qr.drawCanvas();
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}
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```
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- 微信小程序，推荐使用Canvas 2D，关于Canvas 2D的使用请参考微信开放文档。
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### 高级用法
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考虑到部分平台可能不支持`canvas`，所以`uQRCode`并没有强制要求和`canvas`一起使用，您还可以选择其他方式来生成二维码，例如使用`js`操作`dom`进行绘制或是使用`svg`绘制等。以下是示例：
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- uni-app v-for+view
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```html
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<template>
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<view>
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<view class="qrcode">
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<view v-for="(row, rowI) in modules" :key="rowI" style="display: flex;flex-direction: row;">
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<view v-for="(col, colI) in row" :key="colI">
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<view v-if="col.isBlack" style="width: 10px;height: 10px;background-color: black;">
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<!-- 黑色码点 -->
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</view>
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<view v-else style="width: 10px;height: 10px;background-color: white;">
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<!-- 白色码点 -->
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</view>
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</view>
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</view>
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</view>
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</view>
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</template>
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<script>
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import UQRCode from '../../uni_modules/Sansnn-uQRCode/js_sdk/uqrcode/uqrcode.js';
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export default {
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data() {
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return {
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modules: []
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}
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},
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onLoad() {
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const qr = new UQRCode();
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qr.data = 'uQRCode';
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qr.make();
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this.modules = qr.modules;
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},
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methods: {
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}
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}
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</script>
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```
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- js操作dom
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``` html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>uQRCode二维码生成</title>
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</head>
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<body>
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<div id="qrcode" style="position: relative;"></div>
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<script type="text/javascript" src="uqrcode.js"></script>
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<script>
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// 引入uQRCode
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var UQRCode = window.UQRCode;
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// 获取uQRCode实例
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var qr = new UQRCode();
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// 设置二维码内容
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qr.data = "https://uqrcode.cn/doc";
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// 设置二维码大小，必须与canvas设置的宽高一致
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qr.size = 200;
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// 设置二维码前景图，可以是路径
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qr.foregroundImageSrc =
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'data:image/png;base64,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';
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// 调用制作二维码方法
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qr.make();
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var drawModules = qr.getDrawModules();
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// 遍历drawModules创建dom元素
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var qrHtml = '';
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for (var i = 0; i < drawModules.length; i++) {
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var drawModule = drawModules[i];
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switch (drawModule.type) {
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case 'tile':
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/* 绘制小块 */
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qrHtml += `<div style="position: absolute;left: ${drawModule.x}px;top: ${drawModule.y}px;width: ${drawModule.width}px;height: ${drawModule.height}px;background: ${drawModule.color};"></div>`;
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break;
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case 'image':
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/* 绘制图像 */
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qrHtml += `<img style="position: absolute;left: ${drawModule.x}px;top: ${drawModule.y}px;width: ${drawModule.width}px;height: ${drawModule.height}px;" src="${drawModule.imageSrc}" />`;
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break;
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}
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}
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document.getElementById('qrcode').innerHTML = qrHtml;
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</script>
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</body>
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</html>
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```
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- svg
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``` html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>uQRCode二维码生成</title>
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</head>
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<body>
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<svg id="qrcode" width="200" height="200" xmlns="http://www.w3.org/2000/svg" version="1.1"></svg>
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<script type="text/javascript" src="uqrcode.js"></script>
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<script>
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// 引入uQRCode
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var UQRCode = window.UQRCode;
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// 获取uQRCode实例
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var qr = new UQRCode();
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// 设置二维码内容
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qr.data = "https://uqrcode.cn/doc";
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// 设置二维码大小，必须与canvas设置的宽高一致
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qr.size = 200;
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// 设置二维码前景图，可以是路径
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qr.foregroundImageSrc =
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'data:image/png;base64,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';
|
||
// 调用制作二维码方法
|
||
qr.make();
|
||
|
||
var drawModules = qr.getDrawModules();
|
||
// 遍历drawModules创建svg元素
|
||
var qrHtml = '';
|
||
for (var i = 0; i < drawModules.length; i++) {
|
||
var drawModule = drawModules[i];
|
||
switch (drawModule.type) {
|
||
case 'tile':
|
||
/* 绘制小块 */
|
||
qrHtml += `<rect x="${drawModule.x}" y="${drawModule.y}" width="${drawModule.width}" height="${drawModule.height}" style="fill: ${drawModule.color};" />`;
|
||
break;
|
||
case 'image':
|
||
/* 绘制图像 */
|
||
qrHtml += `<image href="${drawModule.imageSrc}" x="${drawModule.x}" y="${drawModule.y}" width="${drawModule.width}" height="${drawModule.height}" />`;
|
||
break;
|
||
}
|
||
}
|
||
document.getElementById('qrcode').innerHTML = qrHtml;
|
||
</script>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
> 更多用法大家自行探索咯，期待分享哟~
|
||
|
||
### 导出临时文件路径
|
||
|
||
原生方式基于`Canvas`的，请自行参阅各平台`Canvas`的导出方式。以下是部分示例：
|
||
|
||
- uni-app
|
||
```javascript
|
||
// 通过uni.createCanvasContext方式创建绘制上下文的，对应导出API为uni.canvasToTempFilePath
|
||
// 调用完ctx.draw()方法后不能第一时间导出，否则会异常，需要有一定的延时
|
||
setTimeout(() => {
|
||
uni.canvasToTempFilePath(
|
||
{
|
||
canvasId: this.canvasId,
|
||
fileType: this.fileType,
|
||
width: this.canvasWidth,
|
||
height: this.canvasHeight,
|
||
success: res => {
|
||
console.log(res);
|
||
},
|
||
fail: err => {
|
||
console.log(err);
|
||
}
|
||
},
|
||
// this // 组件内使用必传当前实例
|
||
);
|
||
}, 300);
|
||
```
|
||
|
||
- Canvas2D
|
||
```javascript
|
||
// 得到base64
|
||
console.log(canvas.toDataURL());
|
||
// 得到buffer
|
||
console.log(canvas.toBuffer());
|
||
```
|
||
|
||
### 保存二维码到本地相册
|
||
|
||
必须在导出临时文件路径成功后再执行保存。uni-app通用保存方式（H5除外）：
|
||
```javascript
|
||
uni.saveImageToPhotosAlbum({
|
||
filePath: tempFilePath,
|
||
success: res => {
|
||
console.log(res);
|
||
},
|
||
fail: err => {
|
||
console.log(err);
|
||
}
|
||
});
|
||
```
|
||
|
||
H5可以通过设置`<a>`标签`href`属性的方式进行保存：
|
||
```javascript
|
||
const aEle = document.createElement('a');
|
||
aEle.download = 'uQRCode'; // 设置下载的文件名，默认是'下载'
|
||
aEle.href = tempFilePath;
|
||
document.body.appendChild(aEle);
|
||
aEle.click();
|
||
aEle.remove(); // 下载之后把创建的元素删除
|
||
```
|
||
经过测试，PC端浏览器可以下载，部分安卓自带或第三方浏览器可以下载，安卓微信浏览器不适用，移动端iOS所有浏览器均不适用，差异较大，还是推荐各位导出文件给图片组件显示，然后提示用户通过长按图片进行保存这种方式。
|
||
|
||
## uni-app组件方式
|
||
|
||
### 安装
|
||
|
||
通过uni-app插件市场地址安装：[https://ext.dcloud.net.cn/plugin?id=1287](https://ext.dcloud.net.cn/plugin?id=1287)。详细配置请移步到：文档 > [uni-app组件](https://uqrcode.cn/doc/document/uni-app.html)。
|
||
|
||
### 引入
|
||
|
||
uni-app默认为easycom模式，可直接键入`<uqrcode>`标签。
|
||
|
||
### 简单用法
|
||
|
||
安装`uqrcode`组件后，在`template`中键入`<uqrcode/>`。设置`ref`属性可使用组件内部方法，`canvas-id`属性为组件内部的canvas组件标识，`value`属性为二维码生成对应内容，`options`为配置选项，可配置二维码样式，绘制Logo等，详见：[options](https://uqrcode.cn/doc/document/uni-app.html#options) 。
|
||
|
||
``` html
|
||
<uqrcode ref="uqrcode" canvas-id="qrcode" value="https://uqrcode.cn/doc" :options="{ margin: 10 }"></uqrcode>
|
||
```
|
||
|
||
### 导出临时文件路径
|
||
|
||
为了保证方法调用成功，请在 [complete](https://uqrcode.cn/doc/document/uni-app.html#complete) 事件返回`success=true`后调用。
|
||
|
||
```javascript
|
||
// uqrcode为组件的ref名称
|
||
this.$refs.uqrcode.toTempFilePath({
|
||
success: res => {
|
||
console.log(res);
|
||
}
|
||
});
|
||
```
|
||
|
||
### 保存二维码到本地相册
|
||
|
||
为了保证方法调用成功，请在 [complete](https://uqrcode.cn/doc/document/uni-app.html#complete) 事件返回`success=true`后调用。
|
||
|
||
```javascript
|
||
// uqrcode为组件的ref名称
|
||
this.$refs.uqrcode.save({
|
||
success: () => {
|
||
uni.showToast({
|
||
icon: 'success',
|
||
title: '保存成功'
|
||
});
|
||
}
|
||
});
|
||
```
|
||
|
||
## 更多使用说明请前往官方文档查看：[https://uqrcode.cn/doc](https://uqrcode.cn/doc)。 |