应用程序启动器如何自我更新？

我从未尝试过，但这就是我的猜测（假设您无法覆盖正在执行的文件。如果可以，这一切都比较简单）

Updater A checks if its the newest versionIf launcher isnt the newest version    Download the differences (to save bandwidth) to file B    Apply the delta to own pre into file C    Launch file C.    CloseIf file C exists (update happened recently)    Try to delete C  (update was previous launch, delete temporary file)    If delete fails  (We are C, means A is out of date)        Copy C over A  (update launcher)        Note that you can keep going, dont have to restart even though we are C.If game isnt newest version    Download the differences (to save bandwidth) to file B    Apply the delta to game into file D    delete game    Rename D -> gameRun game