实现原理:调取手机摄像头扫一扫功能实现
注:调取手机摄像头需要再https协议
下才可以,有的项目启动配置https:true
可以实现启动的项目协议为https
且可以访问,有的还是需要证书才能访问
实现
1、下载html5-qrcode
npm i html5-qrcode
2、使用
import { reactive, onMounted, onUnmounted, ref } from 'vue' import { showToast } from 'vant'; import { Html5Qrcode } from 'html5-qrcode' let html5QrCode = ref(null) onMounted(() => { getCameras() }) const onSearchOrder = () => { console.log('在运运单') router.push('order') } onUnmounted(() => { stop() }) const getCameras = () => { Html5Qrcode.getCameras() .then((devices) => { if (devices && devices.length) { isShow.value = true html5QrCode = new Html5Qrcode('reader') // start开始扫描 start() } }) .catch((err) => { // handle err console.log('获取设备信息失败', err) // 获取设备信息失败 showToast('获取设备信息失败') }) } const start = () => { html5QrCode .start( {facingMode: "environment" }, { fps: 20, // 设置每秒多少帧 qrbox: { width: 250, height: 250 } // 设置取景范围 // scannable, rest shaded. }, (decodedText, decodedResult) => { alert('扫码结果' + decodedText) }, (errorMessage) => { // parse error, ideally ignore it. For example: // console.log(`QR Code no longer in front of camera.`); console.log('暂无额扫描结果', errorMessage) } ) .catch((err) => { // Start failed, handle it. For example, console.log(`Unable to start scanning, error: ${err}`) }) } const stop = () => { if (devicesInfo.value) { html5QrCode .stop() .then((ignore) => { // QR Code scanning is stopped. console.log('QR Code scanning stopped.', ignore) }) .catch((err) => { // Stop failed, handle it. console.log('Unable to stop scanning.', err) }) } } .container { position: relative; top: 0px; left: 0px; height: 100vh; width: 100%; background: rgba($color: #000000, $alpha: 0.48); z-index: 999; } #reader { top: 50%; left: 0; transform: translateY(-50%); }
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