How to notify users of wechat applet version update?

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Catalog

One 、 problem

Two 、 Solutions

3、 ... and 、 Core code display

Four 、 Simulation test and verification of updated version

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One 、 problem

      When a new version of the applet is released , If the user has visited the applet before , Enter through an open applet （ Not manually deleted ）, Then a prompt will pop up , Remind users to update the new version . The user can restart the update automatically by clicking OK , Click Cancel to close the pop-up window , No more updates .

Two 、 Solutions

1、 Open the applet , Check whether there is a new version of the applet

updateManager.onCheckForUpdate(function (res) {})

2、 There is a new version of the applet , Then download the new version silently , Get ready to update

updateManager.onUpdateReady(function () {})

3、 The new version has been downloaded , call applyUpdate Apply the new version and restart the applet

updateManager.applyUpdate()

3、 ... and 、 Core code display

App({     onLaunch: function(options) {          this.autoUpdate()     },    autoUpdate:function(){         var self=this //  Get applet update mechanism compatibility          if (wx.canIUse('getUpdateManager')) {             const updateManager = wx.getUpdateManager() //1.  Check whether there is a new version of the applet                                  updateManager.onCheckForUpdate(function (res) { //  Call back after requesting new version information                  if (res.hasUpdate) { //2.  There is a new version of the applet , Then download the new version silently , Get ready to update                                                                   updateManager.onUpdateReady(function () {                     wx.showModal({                             title: ' Update hints ',                             content: ' The new version is ready , Restart application or not ？',                             success: function (res) {                                 if (res.confirm) {                                    //3.  The new version has been downloaded , call applyUpdate Apply new version and restart                                       updateManager.applyUpdate()                                 } else if (res.cancel) {                                         // Do not use                                      }                                 }                                 })                                  })            updateManager.onUpdateFailed(function () {                    //  New version download failed                  wx.showModal({ title: ' There is a new version ~',                          content: ' The new version is online ~, Please delete the current applet , Search again open ~',                                           })                })             }            })        } else { //  If you want users to experience your applet on the latest version of the client , You can prompt like this                 wx.showModal({ title: ' Tips ',             content: ' Current wechat version is too low , This feature is not available , Please upgrade to the latest wechat version and try again .'             })             }         }         })

Four 、 Simulation test and verification of updated version

Wechat developers can use 「 Compile mode 」 Under the 「 Next time you compile a simulation update 」 Switch to debug .

Click the compile mode settings drop-down list , And then click “ Add compilation mode ”, In the user-defined compilation condition pop-up interface , Click Next edit

Translation time simulation update , Then click OK , Recompile it .

notes : It should be noted that , In this way, the simulation fails after one update , Later, we still need to test this compilation mode

Reset it .

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summary

This article introduces the notification mechanism of wechat applet after version update , I hope that's helpful

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