vue实现二维码扫码功能(带样式)

需求：
利用vue实现二维码扫描；

插件：
QRCodeReader；

插件下载

npm install --save vue-qrcode-reader

注意：
需要在https协议下才可以调用相机，实现扫码。
可以通过配置vue.config.js中的devServer:{https:true}
或参照前文章 前端使用Nuxt框架，配置本地https访问 配置本地证书

<template>
<div>
  <p class="error">{{ error }}</p>
  <!--错误信息-->

  <p class="decode-result">
    扫描结果:
    <b>{{ result }}</b>
  </p>
  <!--扫描结果-->

  <qrcode-stream @decode="onDecode" @init="onInit" style="height: 100vh;">
    <div>
      <div class="qr-scanner">
        <div class="box">
          <div class="line"></div>
          <div class="angle"></div>
        </div>
      </div>
    </div>
  </qrcode-stream>
</div>
</template>

<script>
// 下载插件
// cnpm install --save  vue-qrcode-reader

// 引入
import { QrcodeStream } from 'vue-qrcode-reader'

export default {
// 注册
components: { QrcodeStream },

data() {
  return {
    result: '', // 扫码结果信息
    error: '' // 错误信息
  }
},

methods: {
  onDecode(result) {
    alert(result)
    this.result = result
  },

  async onInit(promise) {
    try {
      await promise
    } catch (error) {
      if (error.name === 'NotAllowedError') {
        this.error = 'ERROR: 您需要授予相机访问权限'
      } else if (error.name === 'NotFoundError') {
        this.error = 'ERROR: 这个设备上没有摄像头'
      } else if (error.name === 'NotSupportedError') {
        this.error = 'ERROR: 所需的安全上下文(HTTPS、本地主机)'
      } else if (error.name === 'NotReadableError') {
        this.error = 'ERROR: 相机被占用'
      } else if (error.name === 'OverconstrainedError') {
        this.error = 'ERROR: 安装摄像头不合适'
      } else if (error.name === 'StreamApiNotSupportedError') {
        this.error = 'ERROR: 此浏览器不支持流API'
      }
    }
  }
}
}
</script>

<style scoped>
.error {
font-weight: bold;
color: red;
}
</style>

<style scoped>
  /* * {
    margin: 0;
    padding: 0;
  }
  body {
    height: 700px;
    margin: 0;
  } */

  .qr-scanner {
    background-image:
      linear-gradient(0deg,
        transparent 24%,
        rgba(32, 255, 77, 0.1) 25%,
        rgba(32, 255, 77, 0.1) 26%,
        transparent 27%,
        transparent 74%,
        rgba(32, 255, 77, 0.1) 75%,
        rgba(32, 255, 77, 0.1) 76%,
        transparent 77%,
        transparent),
      linear-gradient(90deg,
        transparent 24%,
        rgba(32, 255, 77, 0.1) 25%,
        rgba(32, 255, 77, 0.1) 26%,
        transparent 27%,
        transparent 74%,
        rgba(32, 255, 77, 0.1) 75%,
        rgba(32, 255, 77, 0.1) 76%,
        transparent 77%,
        transparent);
    background-size: 3rem 3rem;
    background-position: -1rem -1rem;
    width: 100%;
    /* height: 100%; */
    height: 100vh;
    position: relative;
    background-color: #1110;

    /* background-color: #111; */
  }

  .qr-scanner .box {
    width: 213px;
    height: 213px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
    border: 0.1rem solid rgba(0, 255, 51, 0.2);
    /* background: url('http://resource.beige.world/imgs/gongconghao.png') no-repeat center center; */
  }

  .qr-scanner .line {
    height: calc(100% - 2px);
    width: 100%;
    background: linear-gradient(180deg, rgba(0, 255, 51, 0) 43%, #00ff33 211%);
    border-bottom: 3px solid #00ff33;
    transform: translateY(-100%);
    animation: radar-beam 2s infinite alternate;
    animation-timing-function: cubic-bezier(0.53, 0, 0.43, 0.99);
    animation-delay: 1.4s;
  }

  .qr-scanner .box:after,
  .qr-scanner .box:before,
  .qr-scanner .angle:after,
  .qr-scanner .angle:before {
    content: '';
    display: block;
    position: absolute;
    width: 3vw;
    height: 3vw;

    border: 0.2rem solid transparent;
  }

  .qr-scanner .box:after,
  .qr-scanner .box:before {
    top: 0;
    border-top-color: #00ff33;
  }

  .qr-scanner .angle:after,
  .qr-scanner .angle:before {
    bottom: 0;
    border-bottom-color: #00ff33;
  }

  .qr-scanner .box:before,
  .qr-scanner .angle:before {
    left: 0;
    border-left-color: #00ff33;
  }

  .qr-scanner .box:after,
  .qr-scanner .angle:after {
    right: 0;
    border-right-color: #00ff33;
  }

  @keyframes radar-beam {
    0% {
      transform: translateY(-100%);
    }

    100% {
      transform: translateY(0);
    }
  }
</style>

好，下面在一段代码vue项目中实现扫码功能

项目地址：https://github.com/wkl007/vue-scan-demo.git
项目主要是做的一个扫码的功能
核心代码为

<div class="scan">
  <div id="bcid">
    <div style="height:40%"></div>
    <p class="tip">...载入中...</p>
  </div>
  <footer>
    <button @click="startRecognize">1.创建控件</button>
    <button @click="startScan">2.开始扫描</button>
    <button @click="cancelScan">3.结束扫描</button>

    <button @click="closeScan">4.关闭控件</button>
  </footer>
</div>
</template>

<script type='text/ecmascript-6'>
let scan = null

export default {
  data () {
    return {
      codeUrl: '',
    }
  },
  methods: {
    // 创建扫描控件
    startRecognize () {
      let that = this
      if (!window.plus) return
      scan = new plus.barcode.Barcode('bcid')
      scan.onmarked = onmarked

      function onmarked (type, result, file) {
        switch (type) {
          case plus.barcode.QR:
            type = 'QR'
            break
          case plus.barcode.EAN13:
            type = 'EAN13'
            break
          case plus.barcode.EAN8:
            type = 'EAN8'
            break
          default:
            type = '其它' + type
            break
        }
        result = result.replace(/\n/g, '')
        that.codeUrl = result
        alert(result)
        that.closeScan()

      }
    },
    // 开始扫描
    startScan () {
      if (!window.plus) return
      scan.start()
    },
    // 关闭扫描
    cancelScan () {
      if (!window.plus) return
      scan.cancel()
    },
    // 关闭条码识别控件
    closeScan () {
      if (!window.plus) return
      scan.close()
    },
  }
}
</script>
<style lang="less">
.scan {
  height: 100%;

  #bcid {
    width: 100%;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 3rem;
    text-align: center;
    color: #fff;
    background: #ccc;
  }

  footer {
    position: absolute;
    left: 0;
    bottom: 1rem;
    height: 2rem;
    line-height: 2rem;
    z-index: 2;
  }
}
</style>

关于vue实现扫码功能，带样式的文章就介绍至此，更多相关vue扫码功能内容请搜索编程教程以前的文章，希望大家多多支持编程教程！

注意：实现动画时不能有scoped！！！！通过gif<template><div class="test"> <div id="map" ref="map" s ...