依照文档实现私密消息：https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/share/private-message.html

1. 云函数+云调用

云端代码片段：

async function createActivityId (event){
  try {
    const result = await cloud.openapi.updatableMessage.createActivityId({
      openid: cloud.getWXContext().OPENID 
    })
    // result 结构
    // { errCode: 0, errMsg: 'openapi.templateMessage.send:ok' }
    return result
  } catch (err) {
    // 错误处理
    // err.errCode !== 0
    throw err
  }
}

云函数日志：

2. 页面onLoad中获取activityId，并updateShareMenu

  onLoad: function (options) {
     
      this.setShareTicket()
    },
    setShareTicket: async function () {
      const activityId = await createActivityId()
      console.log(activityId)
      if (activityId) {
        wx.updateShareMenu({
          withShareTicket: true,
          isPrivateMessage: true,
          activityId: activityId
        })
      }
    },
  onShareAppMessage() {
    const { openId, userInfo } = this.data
        return {
          title: userInfo.nickName,
          imageUrl: '/images/wx_share.jpeg',
          path: `/pages/other/index?openId=${openId}`
        }
      },

wx.updateShareMenu({
  withShareTicket: true,
  isPrivateMessage: true,
  activityId: 'xxx',
})

3.app.js的onShow中authPrivateMessage

App({
  globalData: {},
  onLaunch(options) {
    if (!wx.cloud) {
      console.error('请使用 2.2.3 或以上的基础库以使用云能力')
    } else {
      wx.cloud.init({
        env: 'prod',
        traceUser: true,
      })
    }
  },
  onShow(options) {
    const { shareTicket,referrerInfo } = options
    console.log(shareTicket,referrerInfo)
    if(shareTicket){
      this.authPrivate(shareTicket)
    }
  },
  authPrivate:function(shareTicket,callback){
    wx.authPrivateMessage({
      shareTicket: shareTicket,
      success(res) {
        console.log('authPrivateMessage success', res)
        // res
        // {
        //   errMsg: 'authPrivateMessage:ok'
        //   valid: true
        //   iv: 'xxxx',
        //   encryptedData: 'xxxxxx'
        // }
      },
      fail(res) {
        console.log('authPrivateMessage fail', res)
      }
    })
  }
})

4.分别在Android和IOS测试

Android结果：

authPrivateMessage success

Object {
encryptedData: "<Undefined>"
errMsg: "authPrivateMessage:ok"
iv: "<Undefined>"
valid: false
}

IOS结果：

authPrivateMessage fail

Object {
errMsg: "authPrivateMessage:fail data unknow error code"
err_code: "1"
}

Android system info：

System: Android 9, WeChat 8.0.1.1841
Network: wifi
UA: Mozilla/5.0 (Linux; Android 9; HWI-AL00 Build/HUAWEIHWI-AL00; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.62 XWEB/2759 MMWEBSDK/201201 Mobile Safari/537.36 MMWEBID/2806 MicroMessenger/8.0.1.1841(0x2800015D) Process/appbrand0 WeChat/arm64 Weixin NetType/WIFI Language/zh_CN ABI/arm64 MiniProgramEnv/android
WeChatLib: 2.16.0 (2021.3.10 13:24:55)

Android 关于手机

IOS system info：(无法复制，就用图片吧）