需求：
利用實現二維碼掃描；

外掛：
QRCodeReader；

外掛下載

npm install --save vue-qrcode-reader

注意：
需要在https協議下才可以呼叫相機，實現掃碼。
可以通過配置vue.config.中的devServer:{https:true}
或參照前文章 前端使用Nuxt框架，配置本地https訪問 配置本地證書

<template>
  <div>
    <p class="error">{{ error }}</p>
    <!--錯誤資訊-->

    <p class="decode-result">
      掃描結果:
      {{ result }}
    </p>
    <!--掃描結果-->

    <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>
      </dDUqNARRRiv>
    </qrcode-stream>
  </div>
</template>

<script>
// 下載外掛
// cnpm install --save  vue-qrcode-reader

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

export default {
  // 註冊
  components: { QrcodeStream },data() {
    return {
      result: '',// 掃碼結果資訊
      error: '' // 錯誤資訊
    }
  },methods: {
    onDecode(result) {
      alert(result)
      this.result = result
    },async onInit(promise) {
      try {
        await promise
      } catch (error) {
        if (error.name === 'NotAllowedError') {
          this.error = 'ERROR: 您需要授予相機訪問許可權'
        } else if (error.name === 'NotFoundError') {
          this.error = 'ERROR: 這個裝置上沒有攝像頭'
        } else if (error.name === 'NotSupportedError') {
          this.error = 'ERROR: 所需的安全上下文(HTTPS、本地主機)'
        } else if (error.name === 'NotReadableError') {
          this.error = 'ERROR: 相機被佔用'
        } else if (error.name === 'OverconstrainedError') {
          this.error = 'ERROR: 安裝攝像頭不合適'
        } else if (error.name === 'StreamApiNotSupportedError') {
          this.error = 'ERROR: 此瀏覽器不支援流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%,0.1) 26%,transparent 27%,transparent 74%,0.1) 75%,0.1) 76%,transparent 77%,transparent),linear-gradient(90deg,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(0,51,0.2);
      /* 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(0,0) 43%,#00ff33 211%);
      border-bottom: 3px solid #00ff33;
      transform: translateY(-100%);
      animation: radar-beam 2s infinite alternate;
      animation-timing-function: cubic-bezier(0.53,0.43,0.99);
      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，下面在一段程式碼vue專案中實現掃碼功能

專案地址：https://.com/wkl007/vue-scan-demo.git
專案主要是做的一個掃碼的功能
核心程式碼為

 <div class="scan">
    <div id="bcid">
      <div style="height:40%"></div>
      <p class="tip">...載入中...</p>
    </div>
    <footer>
      <button @click="startRecognize">1.建立控制元件</button>
      <button @click="startScan">2.開始掃描</button>
      <button @click="cancelScan">3.結束掃描</button>

      <button @click="closeScan">4.關閉控制元件</button>
    </footer>
  </div>
</template>

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

  export default {
    data () {
      return {
        codeUrl: '',}
    },methods: {
      // 建立掃描控制元件
      startReco
 
gnize () {
        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 = resultDUqNARRR
          alert(result)
          that.closeScan()

        }
      },// 開始掃描
      startScan () {
        if (!window.plus) return
        scan.start()
      },// 關閉掃描
      cancelScan () {
        if (!window.plus) return
        scan.cancel()
      },// 關閉條碼識別控制元件
      closeScan () {
        if (!window.plus) return
        scan.close()
      },}
  }
&lwww.cppcns.comt;/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>

到此這篇關於vue實現掃碼功能，帶樣式的文章就介紹到這了,更多相關vue掃碼功能內容請搜尋我們以前的文章或繼續瀏覽下面的相關文章希望大家以後多多支援我們！