小程序获取微信用户的openid

//index.js
//获取应用实例
const app = getApp()

Page({
  globalData: {
    appid: '11121221a89e0',//appid需自己提供
    secret: '1212',//secret需自己提供，此处的
  },

  data: {
    motto: '技术带来改变',
    userInfo: {},
    hasUserInfo: false,
    canIUse: wx.canIUse('button.open-type.getUserInfo')
  },
  //事件处理函数
  bindViewTap: function() {
    wx.switchTab({
      url: '../task/task'
    })
  },

   
 
  onLoad: function () {
    var that = this
    var user = wx.getStorageSync('user') || {};
    var userInfo = wx.getStorageSync('userInfo') || {};
    if ((!user.openid || (user.expires_in || Date.now()) < (Date.now() + 600)) && (!userInfo.nickName)) {
      wx.login({
        success: function (res) {
          if (res.code) {
            wx.getUserInfo({
              success: function (res) {
                var objz = {};
                objz.avatarUrl = res.userInfo.avatarUrl;
                objz.nickName = res.userInfo.nickName;
                console.log(objz);
                wx.setStorageSync('userInfo', objz);//存储userInfo
              }
            });
            var d = that.globalData;//这里存储了appid、secret、token串  
            var l = 'https://api.weixin.qq.com/sns/jscode2session?appid=' + d.appid + '&secret=' + d.secret + '&js_code=' + res.code + '&grant_type=authorization_code';
            wx.request({
              url: l,
              data: {},
              method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT  
              // header: {}, // 设置请求的 header  
              success: function (res) {
                var obj = {};
                obj.openid = res.data.openid;
                obj.expires_in = Date.now() + res.data.expires_in;
                console.log(obj);
                wx.setStorageSync('user', obj);//存储openid  
              }
            });
          } else {
            console.log('获取用户登录态失败！' + res.errMsg)
          }
        }
      });
    }
  },


  getUserInfo: function(e) {
    app.globalData.userInfo = e.detail.userInfo
    this.setData({
      userInfo: e.detail.userInfo,
      hasUserInfo: true
    })
  },
  LoadUserSub: function (res) {
    var openid=res;
    console.log(openid);
  }

})