app.js

//app.js
const TOKEN = 'token';
App({
  globalData:{
    token:'',
  },
  onLaunch: function () {
    if (wx.getStorageSync(TOKEN)&& wx.getStorageSync(TOKEN).length!==0) {
      wx.request({
        url: 'http://123.207.32.32:3000/auth',
        method: 'post',
        header:{
          token:wx.getStorageSync(TOKEN),
        },
        success:function(res){
          if(res.data.errCode == undefined) {
            this.globalData.taken = wx.getStorageSync(TOKEN);
          }else{
            wx.login({
              success: function (res) {
                console.log(res)
                wx.request({
                  url: "http://123.207.32.32:3000/login",
                  data: {
                    code: res.code
                  },
                  method: 'post',
                  success: function (res) {
                    this.globalData.token = res.data.token
                    console.log(res);
                    wx.setStorageSync(TOKEN, res.data.token)
                  }.bind(this)
                })
              }.bind(this)
            })
          }
          console.log(res);
        }.bind(this),
        fail:function(res){
          console.log(res)
        }
      })
    } else {
      wx.login({
        success:function(res){
          console.log(res)
          wx.request({
            url:"http://123.207.32.32:3000/login",
            data:{
              code:res.code
            },
            method:'post',
            success:function(res){
              this.globalData.token=res.data.token
              console.log(res);
              wx.setStorageSync(TOKEN, res.data.token)
            }.bind(this)
          })
        }.bind(this)
      })
    }
    // 展示本地存储能力
    var logs = wx.getStorageSync('logs') || []
    logs.unshift(Date.now())
    wx.setStorageSync('logs', logs)

    // 登录
    wx.login({
      success: res => {
        // 发送 res.code 到后台换取 openId, sessionKey, unionId
      }
    })
    // 获取用户信息
    wx.getSetting({
      success: res => {
        if (res.authSetting['scope.userInfo']) {
          // 已经授权，可以直接调用 getUserInfo 获取头像昵称，不会弹框
          wx.getUserInfo({
            success: res => {
              // 可以将 res 发送给后台解码出 unionId
              this.globalData.userInfo = res.userInfo

              // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
              // 所以此处加入 callback 以防止这种情况
              if (this.userInfoReadyCallback) {
                this.userInfoReadyCallback(res)
              }
            }
          })
        }
      }
    })
  },
  addToCart(obj) {
    // 1.判断是否已经添加进来
    const oldInfo = this.globalData.cartList.find((item) => item.iid === obj.iid)
    if (oldInfo) {
      oldInfo.count += 1
    } else {
      obj.count = 1
      obj.checked = true
      this.globalData.cartList.push(obj)
    }

    // 2.购物车回调
    if (this.addCartCallback) {
      this.addCartCallback()
    }
  },
  globalData: {
    cartList: [],
    userInfo: null,
    name: '邹德敏'
  }
})