启动器在游戏中最常见。想想英雄联盟，星际争霸II或几乎所有的MMO。在开始实际游戏之前，您有一个小型启动器应用程序，负责更新和修补。
我想通过我正在开发的特定非游戏应用程序来朝这个方向发展。启动器的概念非常有意义：它检查更新，替换适当的二进制文件/库，运行完整性检查并启动应用程序。但是，启动器如何自我更新？这往往是罕见的事件，但是如何完成呢？启动程序实际上是否只是覆盖当前正在运行的二进制文件？还是下载后有某种交换步骤？我需要能够将（很少）更新发布到启动器（特别是如果我在启动器中发现一些错误）。
我的特定项目将是C＃，但我对概念上相似的C ++和/或Java解决方案也感兴趣，以供将来参考。
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 version If launcher isnt the newest version Download the differences (to save bandwidth) to file B Apply the delta to own code into file C Launch file C. Close If 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recently) Try to delete C (update was previous launch, delete temporary file) If delete fails (We are C, means A is out of date) Copy C over A (update launcher) Note that you can keep going, dont have to restart even though we are C. If game isnt newest version Download the differences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 -> game Run game
