vue 使用 vue-qr 插件生成二维码并下载
vue-qr 官方 gitee 地址 https://www.npmjs.com/package/vue-qr
安装vue-qr插件
npm install vue-qr --save
引入vue-qr
// vue2
import vueQr from 'vue-qr'
// vue3
import vueQr from 'vue-qr/src/packages/vue-qr.vue'
例子
<template>
<div style="text-align: center;">
<vue-qr
:text="qrUrl"
:callback="qrCallBack"
:size="200"
:margin="10"
colorDark="green"
colorLight="white"
logoSrc="/favicon.ico"
:logoScale="0.2"
:dotScale="0.7">
</vue-qr>
<div style="text-align: center;">
<button @click="downloadQrcode">下载二维码</button>
</div>
</div>
</template>
<script>
// 插件引入
import vueQr from 'vue-qr/src/packages/vue-qr.vue'
export default {
name: 'App',
components: { vueQr },
data () {
return {
// 用于生成二维码的url
qrUrl: 'https://www.npmjs.com/package/vue-qr',
// 下载数据base64
qrDownloadUrl: ''
}
},
methods: {
// 二维码刷新后调用
qrCallBack(qrUrl) {
this.qrDownloadUrl = qrUrl;
},
// 下载二维码
downloadQrcode() {
let a = document.createElement('a');
a.download = '我的二维码';
a.href = this.qrDownloadUrl;
a.click();
},
}
}
</script>
效果图
文章来源：https://www.toymoban.com/news/detail-819950.html
属性说明
这个表格是从vue-qr官方文档中粘贴过来的文章来源地址https://www.toymoban.com/news/detail-819950.html
| 属性 | 说明 |
|---|---|
| text | Contents to encode. 欲编码的内容 |
| correctLevel | Correct Level 0-3 容错级别 0-3 |
| size | Width as well as the height of the output QR code, includes margin. 尺寸, 长宽一致, 包含外边距 |
| margin | Margin to add around the QR code, default 20px. 二维码图像的外边距, 默认 20px |
| colorDark | Color of “true” blocks. Works only when both colorDark and colorLight are set. (BYTE_DTA, BYTE_POS, BYTE_AGN, BYTE_TMG) 实点的颜色 |
| colorLight | Color of empty space, or “false” blocks. Works only when both colorDark and colorLight are set. (BYTE_EPT) 空白区的颜色 |
| components | Controls the appearances of parts in the QR code. Read section ComponentOptions to learn more. 阅读 ComponentOptions 了解更多信息。 |
| bgSrc | Background url to embed in the QR code. 欲嵌入的背景图地址 |
| gifBgSrc | Gif background url to embed in the QR code, If gifBackground is set, backgroundImage will be ignored. This option will affects performance. 欲嵌入的背景图 gif 地址,设置后普通的背景图将失效。设置此选项会影响性能 |
| backgroundColor | Background color 背景色 |
| backgroundDimming | Color mask to add above the background image. Helpful when having problems with decoding. 叠加在背景图上的颜色, 在解码有难度的时有一定帮助 |
| logoSrc | Logo url to embed at the center of generated QR code 嵌入至二维码中心的 LOGO 地址 |
| logoScale | Value used to scale the logo image. Larger value may result in decode failure. Size of the logo equals to logoScale*(size-2*margin). Default is 0.2. 用于计算 LOGO 大小的值, 过大将导致解码失败, LOGO 尺寸计算公式 logoScale*(size-2*margin), 默认 0.2 |
| logoMargin | White margin that appears around the logo image. Default is 0. LOGO 标识周围的空白边框, 默认为0 |
| logoBackgroundColor | Logo background color, need set logo margin. Logo 背景色,需要设置 logo margin |
| logoCornerRadius | Radius of the logo’s corners.Default is 0 LOGO 标识及其边框的圆角半径, 默认为0 |
| whiteMargin | If set to true, a white border will appear around the background image. Default is true. 若设为 true, 背景图外将绘制白色边框 |
| dotScale | Value used to scale down the data dots’ size. (0 < scale < 1.0) default 1 数据区域点缩小比例,默认为1 |
| autoColor | If set to true, the dominant color of backgroundImage will be used as colorDark. Default is true. 若为 true, 背景图的主要颜色将作为实点的颜色, 即 colorDark,默认 true |
| binarize | If set to true, the whole image will be binarized with the given threshold, or default threshold if not specified. Default is false. 若为 true, 图像将被二值化处理, 未指定阈值则使用默认值 |
| binarizeThreshold | Threshold used to binarize the whole image. Default is 128. (0 < threshold < 255) 二值化处理的阈值 |
| callback | Data URI of the generated QR code will be available here. 生成的二维码 Data URI 可以在回调中取得,第一个参数为二维码 data URL, 第二个参数为 props 传过来的 qid(因为二维码生成是异步的,所以加个 id 用于排序) |
| bindElement | If set to true, the generated QR will bind to a HTML element automatically. Default is true. 指定是否需要自动将生成的二维码绑定到HTML上, 默认是true |
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