Solution: wx.switchTab: url does not support queryString

The overall idea: put the parameters that need to be passed into the global js.

1. Define global parameters: in app.js:

  globalData: {
    isSaveRecord: 0,   //我自己的默认值
    search: '',   //我自己的默认值
  },

2. The path in the first page contains parameters, but the url here does not support queryString, so put the parameters in the global js:

    
    var app = getApp()

    Page({    
        // 真实路径：url: '../../second/index/second?        
        //            isSaveRecord='+isSaveRecord+'&search='+search
        // 给全局参数赋值
        app.globalData.isSaveRecord = 1
        app.globalData.search = value    
        wx.switchTab({
          url: '../../second/index/second'
        }) 

3. Get the parameters on the next page:

var app = getApp()

Page({

onShow: function(e) {
    var that = this
    //  获取全局参数，在上一个页面赋值的
    var isSaveRecord = app.globalData.isSaveRecord;
    var search = app.globalData.search;
    //判断是否带参数，带的话执行里边逻辑
    if (search != null || search != '' || search != undefined) {
      //设置到页面data中，其他地方就可以使用了
      that.setData({
        searchContent: search,
        isSaveRecord ：isSaveRecord 
      });
    }
    //  记得，一定要还原全局数据
    app.globalData.isSaveRecord = 0
    app.globalData.search = ''
  },
省略.....
})