vue实现扫码 - 网站测试开发

vue实现二维码识别有些好的组件?

vue3-qr-reader

这是一个适用于vue3的扫码插件, 有很高的自定义度, 用法也很简便, 下面是我根据github案例改写的封装组件, 引入组件后在父组件监听子组件的ok事件获取扫码结果:

// ScanPage.vue
<template>
  <!-- 适用于vue3的扫码组件 -->
  <div class="w-full md:w-80 h-auto overflow-hidden rounded-lg mx-auto my-10">
    <qr-stream
      :camera="camera"
      :torch="flashActive"
      @decode="onDecode"
      @init="onInit"
    >
      <div v-if="error" class="text-red-400 text-center"></div>
    </qr-stream>
  </div>
</template>
   
<script>
import { QrStream } from 'vue3-qr-reader'
export default {
  components: {
    QrStream
  },
  props: {
    scancode: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      result: null,
      camera: 'auto',
      error: '',
      flash: false,
      flashActive: false
    }
  },
  watch: {
    scancode(newValue) {
      if (newValue) {
        this.turnCameraOn()
      } else {
        this.turnCameraOff()
      }
    }
  },
  methods: {
    // 扫码结果回调
    onDecode(data) {
      this.result = data
      console.log(this.result)
      // 停止扫码
      this.turnCameraOff()
      // 延时1s后开启扫码
      if (this.result !== '') {
        // 在父组件监听 ok 事件获取扫码结果
        this.$emit('ok', this.result)
      }
      setTimeout(() => {
        this.turnCameraOn()
      }, 1000)
    },
    // 关闭扫码
    turnCameraOff() {
      this.camera = 'off'
    },
    // 开始扫码
    turnCameraOn() {
      this.camera = 'auto'
      this.result = null
    },
    // 初始化
    async onInit(promise) {
      try {
        const { capabilities } = await promise
        this.flash = capabilities.torch
      } catch (error) {
        if (error.name === 'NotAllowedError') {
          this.error = 'ERROR: you need to grant camera access permisson'
        } else if (error.name === 'NotFoundError') {
          this.error = 'ERROR: no camera on this device. Try upload option.'
        } else if (error.name === 'NotSupportedError') {
          this.error = 'ERROR: secure context required (HTTPS, localhost)'
        } else if (error.name === 'NotReadableError') {
          this.error = 'ERROR: is the camera already in use?'
        } else if (error.name === 'OverconstrainedError') {
          this.error = 'ERROR: installed cameras are not suitable'
        } else if (error.name === 'StreamApiNotSupportedError') {
          this.error = 'ERROR: Stream API is not supported in this browser'
        }
      }
    }
  }
}
</script>
   
<style scope>
@tailwind base;
@tailwind components;
@tailwind utilities;
   
body {
  @apply bg-gray-100 overflow-x-hidden;
}
.container {
  @apply w-4/5 md:max-w-6xl mx-auto;
}
   
a.router-link-active {
  @apply text-indigo-500;
}
   
a.logo {
  @apply text-gray-800;
}
   
.nav {
  @apply px-3 md:px-0 w-full md:max-w-6xl mx-auto;
}
   
/* Transition  */
.slide-enter-active {
  transition: all 0.3s ease-out;
}
   
.slide-leave-active {
  transition: all 0.8s cubic-bezier(1, 0.5, 0.8, 1);
}
   
.slide-enter-from,
.slide-leave-to {
  transform: translateX(20px);
  opacity: 0;
}
   
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.5s ease;
}
   
.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}
   
</style>
   

vue-qrcode-reader

gruhn/vue-qrcode-reader：一组 Vue.js 组件，用于检测和解码 QR 码。 (github.com)

适用于vue2的扫码组件, 不支持深色二维码. 下面是我根据github案例改写的封装组件, 引入组件后在父组件监听子组件的ok事件获取扫码结果, 通过prop(scancode)控制是否开启扫码:

// scan.vue 组件
<template>
  <!-- 适用于vue2的扫码组件但不支持深色二维码 -->
  <div v-if="scancode" class="scan">
    <qrcode-stream @decode="onDecode" @init="onInit">
      <div>
        <div class="qr-scanner">
          <div class="box">
            <div class="line" />
            <div class="angle" />
          </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 },
  props: {
    scancode: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      result: '', // 扫码结果信息
      error: '' // 错误信息
    }
  },
  created() {
    this.clickCode()
  },
  methods: {
    clickCode() {
      this.scancode = true
    },
    // 回调扫描结果
    onDecode(result) {
      if (result !== '') {
        this.scancode = false
        this.$emit('ok', result)
      }
    },
    // 检查是否调用摄像头
    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 lang="scss" scoped>
@import "@/styles/scancode.scss";
</style>
   

// scancode.scss
$barwidth:20vw;
$barheight:20vw;
.scan{
    // width: 30vw;
    width: $barwidth - 0.3 ;
    height: $barheight - 0.3 ;
    //TODO 如过需要在position:fixed下居中显示则需要解开下面四条注释
    // z-index: 1000;
    border-color: #585858;
    // position: fixed;
    // top: calc(50% - 20vh);
    // left: calc(50% - 10vw);
}
.qrcode-stream-camera{
    width: 100%;
    height: 100%;
    display: block;
    -o-object-fit: cover;
    object-fit: cover;
    position: absolute;
    top: 50%;
    left: 50%;
}
    .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%; */
      //TODO 如过需要在position:fixed下居中显示则需要解开下面两条注释
      // height: 100vh;
      // position: relative;
      background-color: #1110;
     
      /* background-color: #111; */
    }
     
    .qr-scanner .box {
      width: $barwidth;
      height: $barheight;
      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);
      }
    }

vue-qr-reader

vue-qr-reader (pulilab.github.io)

适用于vue2的扫码插件, 支持深色, 但自定义程度低

直接在组件中使用:

<template>
	<vue-qr-reader
        v-if="scancode"
        ref="qr"
        class="qrcode"
        @code-scanned="codeArrived"
      />
</template>
<script>
// 安装: npm install -s vue-qr-reader    
import VueQrReader from 'vue-qr-reader/dist/lib/vue-qr-reader.umd.js'
export default {
  components: {
    VueQrReader
  },
  data(){
      return {
          // 通过更改scancode的值开控制扫码组件是否显示
          scancode: false
      }
  }
  methods:{
  	// 返回扫描结果并关闭摄像头
    codeArrived(result) {
        if (result !== '') {
        this.scancode = false
        this.$message({
          type: 'success',
          message: result
        })
    },
  }
}    
</script>    

vue扫码二维码

vue实现二维码识别有些好的组件?