微信小程序如何获取群聊的openGid以及名称详解

Page({

 /**
  * 页面的初始数据
  */
 data: {
  openGid: ''
 },

 /**
  * 生命周期函数--监听页面加载
  */
 onLoad: function (options) {
  let that = this
  wx.showShareMenu({
   withShareTicket: true
  })
  app.getShareTiket(function (globalData) {
   console.log('clickReload---globalData-->' + JSON.stringify(globalData))
   that.setData({
    openGid: globalData.openGid
   })
  })
 },
 clickReload: function () {
  let that = this
  app.getShareTiket(function (globalData) {
   console.log('clickReload---globalData-->' + JSON.stringify(globalData))
   that.setData({
    openGid: globalData.openGid
   })
  })
 }
})

<!--index.wxml-->
<view wx:if="{{openGid}}" class='groupName'>
 群名称：<open-data type="groupName" open-gid="{{openGid}}"></open-data>
</view>

<view wx:else>
 <button bindtap='clickReload'>点击加载群名称</button>
</view>

<view>{{openGid ? openGid : '无'}}</view>

//app.js
App({
 globalData: {
  shareTicket: '',
  openGid: ''
 },
 onLaunch: function (options) {

 },
 onShow: function (options) {
  let that = this
  if (options && options.scene == 1044) {
   that.globalData.shareTicket = options.shareTicket
  }
  console.log('onShow---options=--->' + JSON.stringify(options))
 },
 getShareTiket: function (cb) {
  let that = this
  // 展示本地存储能力
  if (that.globalData.shareTicket) {
   wx.getShareInfo({
    shareTicket: that.globalData.shareTicket,
    success: function (res) {
     console.log('getShareTiket---shareTicket-->' + JSON.stringify(res))
     let js_encryptedData = res.encryptedData
     let js_iv = res.iv
     wx.login({
      success: function (res) {
       let js_code = res.code
       console.log('code-->' + js_code)
       wx.request({
        url: 'xxxxxxxx',
        method: 'POST',
        data: {
         code: js_code,
         appId: 'xxxxx',
         encryptedData: js_encryptedData,
         iv: js_iv
        },
        success: function (res) {
         that.globalData.openGid = res.data.openGId
         console.log('getShareTiket---openGid' + that.globalData.openGid)
         typeof cb == "function" && cb(that.globalData)
        },
        fail: function (err) {
         console.log('getShareTiket---err' + JSON.stringify(err))
        }
       })
      }
     })
    }
   })
  } else {
   console.log('不存在shareTicket')
  }
 }
})