1. Attention
vue-qrcode-reader uses camera parsing. For security reasons, the browser can only access the camera under the https protocol or localhost, so
代码需要部署所在的服务器需要https
2. Specific implementation ①
- Install plugin
npm install --save vue-qrcode-reader
- Create component
<template>
<div>
<qrcode-stream v-if="show" :camera="camera" :torch="torchActive" @decode="onDecode" @init="onInit">
<div>
<div class="qr-scanner">
<div class="box">
<div class="line"></div>
<div class="angle"></div>
</div>
</div>
</div>
</qrcode-stream>
</div>
</template>
<script>
import {
QrcodeStream } from 'vue-qrcode-reader';
export default {
components: {
QrcodeStream
},
data() {
return {
torchActive: false,
camera: 'auto',
};
},
props: {
show: {
type: Boolean,
default: false
}
},
methods: {
async onDecode(scanResult) {
// TODO 逻辑处理或直接返回扫码结果
this.$emit('getScanResult', scanResult)
},
async onInit(promise) {
const {
capabilities
} = await promise;
const TORCH_IS_SUPPORTED = !!capabilities.torch;
try {
await promise;
} catch (error) {
if (error.name === 'NotAllowedError') {
this.$toast.fail('ERROR');
} else if (error.name === 'NotFoundError') {
this.$toast.fail('这个设备上没有摄像头');
} else if (error.name === 'NotSupportedError') {
this.$toast.fail('所需的安全上下文(HTTPS、本地主机)');
} else if (error.name === 'NotReadableError') {
this.$toast.fail('相机被占用');
} else if (error.name === 'OverconstrainedError') {
this.$toast.fail('安装摄像头不合适');
} else if (error.name === 'StreamApiNotSupportedError') {
this.$toast.fail('此浏览器不支持流API');
}
}
},
},
};
</script>
<style scoped>
.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: 29vh;
position: relative;
background-color: #1110;
}
.qr-scanner .box {
width: 213px;
height: 213px;
position: absolute;
left: 50%;
top: 100%;
transform: translate(-50%, -50%);
overflow: hidden;
border: 0.1rem solid rgba(0, 255, 51, 0.2);
}
.qr-scanner .txt {
width: 100%;
height: 35px;
line-height: 35px;
font-size: 14px;
text-align: center;
margin: 0 auto;
position: absolute;
top: 70%;
left: 0;
}
.qr-scanner .myQrcode {
text-align: center;
color: #00ae10;
}
.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>
3. Component usage
- Import components
import qrcode from '@/components/qrcode-scan/qrcode.vue'
- Register component
components: {
'vue-qrcode': qrcode
},
- The original code scanning pop-up window style is not very beautiful and difficult to control. Use vant pop-up window to control the style. Definition
showScanDefault false
<!-- 扫码弹窗 -->
<van-dialog class="dailog-sm" v-model="showScan" :showConfirmButton="false" :close-on-click-overlay="true">
<vue-qrcode :show="showScan" @getScanResult="getScanResult"></vue-qrcode>
<div class="btns-sm">
<van-button size="large" type="info" @click="showScan = false">取消</van-button>
</div>
</van-dialog>
- getScanResult
// 扫码结果逻辑处理
async getScanResult (scanResult) {
console.log(scanResult);
}
- Pop-up window takes up H5 page style adjustment
.dailog-sm{
left: 0;
top: 0;
bottom: 0;
right: 0;
-webkit-transform: translate3d(0, 0, 0);
transform: translate3d(0, 0, 0);
border-radius: 0;
width: auto;
.qrcode-stream-wrapper{
height: 92vh;
video{
height: 92vh;
}
}
.van-dialog__content{
height: 92%;
.dialog{
height: 100%;
}
.qr-scanner{
height: 100vh;
.box{
top: 40%;
width: 60vw;
height: 60vw;
}
}
}
.btns-sm{
position: fixed;
bottom: 0;
left: 0;
right: 0;
padding: 0;
background: #000;
height: 8vh;
text-align: center;
.van-button{
display: inline-block;
height: 8vh;
background: none;
color: #fff;
border: none;
font-size: 0.4rem;
}
}
}
4. Effect display
- Under https, no pop-ups or style adjustments are added.
- Under https, add a pop-up window without style adjustment
http, add pop-up window, add style adjustment
5. Finally
As you can see, after the style adjustment, it fills up the screen. The camera cannot be enabled under non-https, and a white screen is displayed.
As required, add
条形码scan support and苹果手机IOSsupport
Note: In addition to localhost testing, other environments also require https environment.In addition, support for IOS is as follows, click to go to the official website
Specific implementation②
- Install plugin
npm install @zxing/library --save
- Create component
<template>
<div class="page-scan" id="app" v-if="show">
<div class="scan-box">
<video ref="video" id="video" class="scan-video" autoplay></video>
<div class="scan-img">
<div class="scan-frame">
<span class="left-t" style="left: 20%; top: 10%;"></span>
<span class="right-t" style="right: 20%; top: 10%;"></span>
<span class="left-b" style="left: 20%; bottom: 10%;"></span>
<span class="right-b" style="right: 20%; bottom: 10%;"></span>
<span class="cross-line" style="margin-top: 8%;"></span>
</div>
</div>
<div class="scan-tip"> {
{
scanTextData.tipMsg}} </div>
</div>
</div>
</template>
<script>
import {
BrowserMultiFormatReader
} from '@zxing/library'
let scanTextData = {
codeReader: null,
tipMsg: '识别条形码/二维码'
}
export default {
name: 'scanCodePage',
data () {
return {
scanTextData: {
codeReader: null,
tipMsg: '识别条形码/二维码'
},
hasBind: false
}
},
props: {
show: {
type: Boolean,
default: false
}
},
mounted () {
scanTextData.codeReader = new BrowserMultiFormatReader()
this.openScan()
},
watch: {
'show' (val) {
if (!val) {
// 关闭摄像头
let thisVideo = document.getElementById('video')
thisVideo.srcObject.getTracks()[0].stop()
scanTextData.codeReader.reset()
} else {
if (scanTextData.codeReader === null) {
scanTextData.codeReader = new BrowserMultiFormatReader()
}
this.openScan()
}
}
},
methods: {
async openScan () {
scanTextData.codeReader.getVideoInputDevices().then((videoInputDevices) => {
// 默认获取第一个摄像头设备id
let firstDeviceId = videoInputDevices[0].deviceId
// 获取第一个摄像头设备的名称
const videoInputDeviceslablestr = JSON.stringify(videoInputDevices[0].label)
if (videoInputDevices.length > 1) {
// 判断是否后置摄像头
if (videoInputDeviceslablestr.indexOf('back') > -1) {
firstDeviceId = videoInputDevices[0].deviceId
} else {
firstDeviceId = videoInputDevices[1].deviceId
}
}
this.decodeFromInputVideoFunc(firstDeviceId)
}).catch(err => {
console.error(err)
})
},
decodeFromInputVideoFunc (firstDeviceId) {
scanTextData.codeReader.reset()
scanTextData.codeReader.decodeFromInputVideoDeviceContinuously(firstDeviceId, 'video', (result, err) => {
if (result && result.text) {
this.handleResult(result.text)
}
if (err && !(err)) {
this.$toast.fail(err)
}
})
},
async handleResult (scanResult) {
// TODO 逻辑处理或直接返回扫码结果
this.$emit('getScanResult', scanResult)
}
}
}
</script>
<style lang="less" scoped>
.scan-box {
position: fixed;
top: 0;
left: 0;
height: 100%;
width: 100vw;
}
.scan-video {
height: 100vh;
width: 100vw;
object-fit: cover;
}
.scan-img {
width: 500px;
height: 500px;
position: fixed;
top: 40%;
left: 50%;
margin-top: -200px;
margin-left: -250px;
z-index: 6;
.scan-frame {
width: 100%;
height: 100%;
position: relative;
.left-t,
.right-t,
.left-b,
.right-b {
position: absolute;
width: 80px;
height: 80px;
}
.left-t {
top: 0;
left: 0;
border-top: 2px solid #17B1B7;
border-left: 2px solid #17B1B7;
}
.right-t {
top: 0;
right: 0;
border-top: 2px solid #17B1B7;
border-right: 2px solid #17B1B7;
}
.left-b {
bottom: 0;
left: 0;
border-bottom: 2px solid #17B1B7;
border-left: 2px solid #17B1B7;
}
.right-b {
bottom: 0;
right: 0;
border-bottom: 2px solid #17B1B7;
border-right: 2px solid #17B1B7;
}
.cross-line {
width: 300px;
height: 10px;
background: linear-gradient(to right, rgba(255, 255, 255, 0), #5DDDD3, rgba(255, 255, 255, 0));
position: absolute;
top: 0;
left: 20%;
animation: identifier_p 5s infinite;
}
@keyframes identifier_p {
0% {
top: 0%;
}
50% {
top: 82%;
}
100% {
top: 0;
}
}
}
}
.scan-tip {
width: 100vw;
text-align: center;
margin-bottom: 5vh;
color: white;
font-size: 5vw;
position: absolute;
bottom: 50px;
left: 0;
color: #fff;
}
.page-scan {
overflow-y: hidden;
}
</style>