When a non-mandatory version upgrade, users can cancel the update, the old version can be used normally. User next time you start app, can still update prompt appears. (If the upgrade is not mandatory, that the old and new versions of the app running while essential, this time need to consider the compatibility of back-end interface when the old and new versions in parallel. During the old version features compatibility verification, can be tested and the main process changes affect the detailed verification function interface, which would reduce the range of the test, the test time is reduced while ensuring the appropriate changes are tested.)
When an upgrade version is mandatory when the update gives users do not update, quit the client. The next time you start the app, still appears mandatory upgrade tips
When a new version of the client, in case of a local not remove the client directly to check whether the update can be updated properly.
When a new version of the client, in case of a local not remove the client, the client function after checking whether the update is a new version.
When a new version of the client, in the case does not remove local clients, check the resource file with the same name as the normal picture is updated to the latest version.
Cross-version upgrade.
Verifies the digital signature (see the version number)
Network status: whether the upgrade can be normal under 2G / 3G / 4Gwifi
Can be downloaded on smart affect traffic
Covering the upgrade: test coverage before the upgrade, you need to use the older version of analog users to create cache data, and then upgrade, upgrade confirm the cached data can be displayed, related functions work properly
