How does the applet get the user's openid, unique, like WeChat

How does the applet get the user's openid, unique, like WeChat

 

wx.getUserInfo(OBJECT) can only get nickName, avatarUrl, gender, these

A: openid two ways.

1. Login to get the code. Exchange code for openid and a key

2.userinfo has encrypted data. Decrypt to get openid

1.   onLoad: function () {
2.     var that = this
3.     wx.login({
4.       success: function (res) {
5.         console.log("res.code====="+res.code);
6.         if (res.code) {
7.           //Initiate a network request
8.           wx.request({
9.             url: 'https://api.weixin.qq.com/sns/jscode2session?appid=wxaasdf22we1sdffe3&secret=83ebdsdfsdfa7sdfsdf3448ff3f71&js_code=' + res.code + '&grant_type=authorization_code',
10.             method: "POST",
11.             success: function (res) {
12.                
13.               that.setData({
14.                 openid: res.data.openid
15.               })
16.             }
17.           })
18.         } else {
19.           console.log('Failed to get user login status!' + res.errMsg)
20.         }
21.       }
22.     });
23.   }

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