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ddapp-qrcode

v1.0.0

Published

generate qrcode in weapp

Downloads

3

Readme

weapp-qrcode

npm version change-log

ddapp.qrcode.js 在 钉钉小程序 中,快速生成二维码

Usage

先在 wxml 文件中,创建绘制的 canvas,并定义好 width, height, canvasId

<canvas style="width: 200px; height: 200px;" canvas-id="myQrcode"></canvas>

直接引入 js 文件,使用 drawQrcode() 绘制二维码。!!!在 调用 drawQrcode() 方法之前,一定要确保可以获取到 canvas context

在 v0.6.0 版本构建出多个文件,详情移步Build Files说明

// 将 dist 目录下,weapp.qrcode.esm.js 复制到项目目录中
import drawQrcode from '../../utils/weapp.qrcode.esm.js'

drawQrcode({
  width: 200,
  height: 200,
  canvasId: 'myQrcode',
  // ctx: wx.createCanvasContext('myQrcode'),
  text: 'https://github.com/yingye',
  // v1.0.0+版本支持在二维码上绘制图片
  image: {
    imageResource: '../../images/icon.png',
    dx: 70,
    dy: 70,
    dWidth: 60,
    dHeight: 60
  }
})

如果项目使用了 wepy 框架,可直接安装 weapp-qrcode npm包。

npm install ddapp-qrcode --save
import drawQrcode from 'ddapp-qrcode'

drawQrcode({
  width: 200,
  height: 200,
  canvasId: 'myQrcode',
  text: 'https://github.com/yingye'
})

DEMO

更多 demo 可以参考 examples目录,示例包含原生语法及WePY、mpvue、Taro框架。

API

drawQrcode([options])

options

Type: Object

| 参数 | 说明 | 示例| | ------ | ------ | ------ | | width | 必须,二维码宽度,与canvaswidth保持一致 | 200 | | height | 必须,二维码高度,与canvasheight保持一致 | 200 | | canvasId | 非必须,绘制的canvasId | 'myQrcode' | | ctx | 非必须,绘图上下文,可通过 wx.createCanvasContext('canvasId') 获取,v1.0.0+版本支持 | 'wx.createCanvasContext('canvasId')' | | text | 必须,二维码内容 | 'https://github.com/yingye' | | typeNumber | 非必须,二维码的计算模式,默认值-1 | 8 | | correctLevel | 非必须,二维码纠错级别,默认值为高级,取值:{ L: 1, M: 0, Q: 3, H: 2 } | 1 | | background | 非必须,二维码背景颜色,默认值白色 | '#ffffff' | | foreground | 非必须,二维码前景色,默认值黑色 | '#000000' | | _this | 非必须,若在组件中使用,需要传入,v0.7.0+版本支持 | this | | callback | 非必须,绘制完成后的回调函数,v0.8.0+版本支持。安卓手机兼容性问题,可通过自行设置计时器来解决,更多可以参考 issue #18 | function (e) { console.log('e', e) } | | x | 非必须,二维码绘制的 x 轴起始位置,默认值0,v1.0.0+版本支持 | 100 | | y | 非必须,二维码绘制的 y 轴起始位置,默认值0,v1.0.0+版本支持 | 100 | | image | 非必须,在 canvas 上绘制图片,层级高于二维码,v1.0.0+版本支持,更多可参考drawImage | { imageResource: '', dx: 0, dy: 0, dWidth: 100, dHeight: 100 } |

位置信息可以参见下图:

TIPS

weapp.qrcode.js 二维码生成部分借鉴了 jquery-qrcode 源码,可以参考 jquery-qrcode