Unity 编辑器启动时运行自定义编辑器脚本

[InitializeOnLoad]
public class StartupAutoAtlas
{
  
    static StartupAutoAtlas() 
    {
        if (EditorApplication.timeSinceStartup < 5) 
        {
            Debug.Log("编辑器启动  "+EditorApplication.timeSinceStartup.ToString());
        }
    } 
}