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')
 }
 }
})