语法：

steam_is_user_logged_on();

返回： String（字符串）

描述

This function will return true if the Steam client currently has a live connection to the Steam servers. If it returns false, it means there is no active connection due to either a networking issue on the local machine, or the Steam server being down or busy.

例如：

if steam_is_user_logged_on()
   {
   steam_publish_workshop_file("SaveData.txt", "", "Save Text", "Workshop saved text file");
   }

The above code will check to see if the user is logged onto the Steam server and if so it will publish a file to the Workshop.