[uniapp] system hot update implementation ideas

1. Client implementation logic

（1） When the user logs in , Automatically get the latest version number of the server , And match the local version number , If the server version is higher than the local version , Prompt the user to update

（2） The user enters the personal center page , Click version update , Check the updated version number , Click Yes to update the version .

a. If the base version is the same , But the application version number is different , Get from the server wgt Format update profile , Automatic download for update .
（ If there are some problems after the update , Consider uninstalling apk Post login WEB Client re Download apk.）

b. If the base version is different , Then get the new version from the server apk Automatically download and reinstall .

2. The server implements logic

In the system parameter configuration section , Configure update address 、 Update version information （ Include app name 、 Client type 、 Content description 、 Base version number 、 Application version number, etc ）

3. Realization effect ：