HarmonyOS 鸿蒙Next web不通过input组件唤起原生相机，单独写一个交互方法进行唤起，目前返回file类型，前端无法展示问题

https://gitee.com/harmonyos-cases/cases/tree/master/CommonAppDevelopment/feature/webgetcameraimage

 H5中不能直接使用沙箱路径显示图片，可以将图片转为base64显示。nativeCamera参考如下代码：

nativeCamera(args: string, handler: CompleteHandler) {
  PickerUtil.camera().then((uri) => {
    console.debug("测试相机2", uri)
    const context = getContext(this) as common.UIAbilityContext;
    let sanFile = fs.openSync(uri, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)
    const destPath = `${context.filesDir}/test${new Date().getTime()}.jpg`;
    fs.copyFileSync(sanFile.fd, destPath);
    let array: ArrayBuffer = new ArrayBuffer(fs.statSync(sanFile.fd).size)
    fs.readSync(sanFile.fd, array)
    let unit = new Uint8Array(array)
    let base64 = new util.Base64Helper();
    let base64Str = "data:image/png;base64," + base64.encodeToStringSync(unit);
    handler.complete(base64Str)
    console.debug("测试相机2", destPath, base64Str)
  }).catch((err: BusinessError) => {
    console.debug("测试相机异常", JSON.stringify(err))
  })
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>