HarmonyOS鸿蒙Next中H5如何调扫码功能

1、下载html5-qrcode：npm i html5-qrcode 2、参考下面代码：

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%);
}

在HarmonyOS鸿蒙Next中，H5页面可以通过调用系统提供的@ohos.zcode模块来实现扫码功能。首先，需要在config.json中声明ohos.permission.CAMERA权限。然后，在H5页面中使用JavaScript调用@ohos.zcode模块的scan方法。具体步骤如下：

1. 在config.json中添加权限声明：

{
  "module": {
    "requestPermissions": [
      {
        "name": "ohos.permission.CAMERA",
        "reason": "用于扫码功能"
      }
    ]
  }
}

1. 在H5页面中使用JavaScript调用扫码功能：

import zcode from '@ohos.zcode';

async function startScan() {
  try {
    const result = await zcode.scan();
    console.log('Scan result:', result);
  } catch (error) {
    console.error('Scan failed:', error);
  }
}

startScan();

zcode.scan方法会打开系统相机进行扫码，并返回扫码结果。