微信小程序获取用户openid

//app.js
App({
  globalData: {
    appid: 'wxcad584f4d577c495',//appid需自己提供，此处的appid我随机编写  
    secret: '8a0435f0eda9a9f581a4753bb4206851',//secret需自己提供，此处的secret我随机编写  

  },  
  onLaunch: function () {
    // 展示本地存储能力
    var logs = wx.getStorageSync('logs') || []
    var that = this
    var user = wx.getStorageSync('user') || [];
    var userInfo = wx.getStorageSync('userInfo') || []; 
    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
        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) {
              console.log(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)
        }
      }    
      
    })
    // 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)
              }
            }
          })
        }
      },
      
    
    });
     

      
  },
 
})