背景：由于公司可能需要在微信群里面使用打卡功能，因此做了个技术调研。

方案：微信在更新分享接口后，原有的在onShareAppMessage中直接拿shareTicket已不复存在。根据最新文档显示，需要在App.onLaunch()跟App.onShow()中获取。

Demo核心代码：

index.js

1. Page({
2.  
3. /**
4. * 页面的初始数据
5. */
6. data: {
7. openGid: ''
8. },
9.  
10. /**
11. * 生命周期函数--监听页面加载
12. */
13. onLoad: function (options) {
14. let that = this
15. wx.showShareMenu({
16. withShareTicket: true
17. })
18. app.getShareTiket(function (globalData) {
19. console.log('clickReload---globalData-->' + JSON.stringify(globalData))
20. that.setData({
21. openGid: globalData.openGid
22. })
23. })
24. },
25. clickReload: function () {
26. let that = this
27. app.getShareTiket(function (globalData) {
28. console.log('clickReload---globalData-->' + JSON.stringify(globalData))
29. that.setData({
30. openGid: globalData.openGid
31. })
32. })
33. }
34. })

index.wxml

1. <!--index.wxml-->
2. <view wx:if="{{openGid}}" class='groupName'>
3. 群名称：<open-data type="groupName" open-gid="{{openGid}}"></open-data>
4. </view>
5.  
6. <view wx:else>
7. <button bindtap='clickReload'>点击加载群名称</button>
8. </view>
9.  
10. <view>{{openGid ? openGid : '无'}}</view>

app.js

1. //app.js
2. App({
3. globalData: {
4. shareTicket: '',
5. openGid: ''
6. },
7. onLaunch: function (options) {
8.  
9. },
10. onShow: function (options) {
11. let that = this
12. if (options && options.scene == 1044) {
13. that.globalData.shareTicket = options.shareTicket
14. }
15. console.log('onShow---options=--->' + JSON.stringify(options))
16. },
17. getShareTiket: function (cb) {
18. let that = this
19. // 展示本地存储能力
20. if (that.globalData.shareTicket) {
21. wx.getShareInfo({
22. shareTicket: that.globalData.shareTicket,
23. success: function (res) {
24. console.log('getShareTiket---shareTicket-->' + JSON.stringify(res))
25. let js_encryptedData = res.encryptedData
26. let js_iv = res.iv
27. wx.login({
28. success: function (res) {
29. let js_code = res.code
30. console.log('code-->' + js_code)
31. wx.request({
32. url: 'xxxxxxxx',
33. method: 'POST',
34. data: {
35. code: js_code,
36. appId: 'xxxxx',
37. encryptedData: js_encryptedData,
38. iv: js_iv
39. },
40. success: function (res) {
41. that.globalData.openGid = res.data.openGId
42. console.log('getShareTiket---openGid' + that.globalData.openGid)
43. typeof cb == "function" && cb(that.globalData)
44. },
45. fail: function (err) {
46. console.log('getShareTiket---err' + JSON.stringify(err))
47. }
48. })
49. }
50. })
51. }
52. })
53. } else {
54. console.log('不存在shareTicket')
55. }
56. }
57. })

注意事项

1：必须调用这个接口wx.showShareMenu({withShareTicket: true})，否则在App.onLaunch()跟App.onShow()时，你拿不到shareTicket.