小编chi*_*ati的帖子

我正在尝试将下面的 JSON 转换为 Excel，我正在使用XLSX，它将我的 JSON 转换为 Excel，但是，dailyPointsArray 的嵌套数组在转换为 Excel 后为空。

尝试过代码

 const XLSX = require("xlsx");
 const workSheet = XLSX.utils.json_to_sheet(attendanceData);
    const workBook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(workBook, workSheet, "attendance");
    XLSX.write(workBook, { bookType: "xlsx", type: "buffer" });
    XLSX.write(workBook, { bookType: "xlsx", type: "binary" });
    XLSX.writeFile(workBook,"newExcel.xlsx");

attendanceData:[
  {
    workerId: '1230',
    workerFullName: 'A',
    workerDepartment: 'INFORMATION TECHNOLOGY',
    workerDesignation: 'ASSISTANT MANAGER',
    Location: 'locationA',
    dailyPointsArray: [
    {
      inTime: '-',
      Date: '23/03/2022',
      outTime: '-',
      Points: null,
      createdAs: 'ABSENT'
    },
    {
      inTime: '-',
      Date: '24/03/2022',
      outTime: '-',
      Points: null, …

我是 React Native 的新手，我正在使用 expo，如果应用程序在后台或被杀死，我试图获取用户位置。我使用了任务管理器，但我不知道为什么它不起作用。当应用程序在前台运行时，它工作正常，但是当应用程序在后台或被杀死时，它不会给我位置。

我正在使用世博地点中的位置

const LOCATION_TASK_NAME = "background-location-task";

componentDidMount = async () => {

        this._getLocationAsync();
  };

_getLocationAsync = async () => {
    try {
      //ask permission of user for location
      let { status } = await Permissions.askAsync(Permissions.LOCATION);

      //check the location setting
      const permissionStaatus = await Location.getProviderStatusAsync();
      const newStatus = permissionStaatus.locationServicesEnabled;

      //if phone location is disabled
      if (!newStatus) {
        const { navigation } = this.props;
        Alert.alert(
          "Error",
          "Please Turn On you'r Location",
          [
            {
              text: "OK",
              onPress: this.openSetting
            } …