omp-wx/pages/welcome/welcome.js

const APP = getApp();
Page({
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    this.login();
  },
  /**
   * 登录
   */
  login: function () {
    const that = this;
    wx.login({
      success: res => {
        const params = {
          code: res.code
        }
        //登录
        APP.Post(APP.Url.login, params).then(res => {
          APP.globalData.openId = res.data;
          //请求设备集合
          that.getDeviceList(res.data);
        })
      }
    })
  },

  /**
   * 获取设备列表
   */
  getDeviceList: function (userId) {
    const params = {
      userId: userId,
    }
    APP.Get(APP.Url.getListByUserId, params).then(res => {
      APP.globalData.deviceList = res.data;
      wx.switchTab({
        url: '/pages/index/index',
      })
    })
  }
})