最近H5项目用到了扫一扫，本来想用微信的结果只能在微信环境调，就在网上疯狂找插件，终于找到了，和大家分享一下
安装 cnpm install --save vue-qrcode-reader
一、创建组件
<template>
<div class="scan">
<qrcode-stream :camera="camera" @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 {
camera: 'auto',
result: '', // 扫码结果信息
error: '' ,// 错误信息
scancode:true,
}
},
created(){
this.clickCode()
},
methods: {
clickCode() {
this.scancode=true;
},
//回调扫描结果
onDecode (result) {
if(result!==""){
this.scancode=false;
this.$emit("ok",result)
}
},
// 检查是否调用摄像头
async onInit (promise) {
try {
await promise
} catch (error) {
// console.log()
this.$toast(error.name)
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"
}else if (error.name === 'InsecureContextError') {
this.error =
'ERROR: 仅允许在安全上下文中访问摄像机。使用HTTPS或本地主机，而不是HTTP。'
} else {
this.error = 'ERROR:摄像机错误'
}
this.$emit("err",this.error)
}
},
}
}
</script>
<style scoped>
.error {
font-weight: bold;
color: red;
}
</style>
<style scoped>
@import '../css/scancode.scss';
</style>
二、导入css
.scan{
width: 100vw;
border-color: #585858;
position: fixed;
top: 0;
left: 0;
}
.qrcode-stream-camera{
width: 100%;
height: 100%;
display: block;
-o-object-fit: cover;
object-fit: cover;
position: absolute;
top: 0%;
left: 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);
}
}
3、扫一扫页面
<template>
<div class="sys">
<van-nav-bar @click-left="onClickLeft" :safe-area-inset-top="true" title="扫一扫" left-arrow :placeholder="true"
:fixed="true"></van-nav-bar>
<BarScan @ok="getResult" @err="geterror" ></BarScan>
</div>
</template>
<script>
import BarScan from '../../components/scan.vue'
export default {
components:{
BarScan
},
data() {
return {
result:''
}
},
created() {
},
methods:{
onClickLeft(){
this.$router.go(-1);
},
getResult(result){
this.result=result;
},
geterror(e){
this.scancode=false;
this.$toast(e)
},
}
}
</script>
<style>
.sys{
width: 100vw;
height: 100vh;
background: #111;
}
</style>注意事项：
进入扫一扫页面前一个页面缓存会消失，需要使用keep-alive
认为这个扫码识别比较慢也可以看我主页的另一个扫码功能