public void Init()
{
systems = new List <IGameSystem>();
achievementSystem = new AchievementSystem();
campSystem = new CampSystem();
CharacterSystem = new CharacterSystem();
EnergySystem = new EnergySystem();
EventSystem = new GameEventSystem();
StageSystem = new StageSystem();
CampInfoUI = new CampInfoUI();
gamePauseUI = new GamePauseUI();
GameStateInfoUI = new GameStateInfoUI();
soldierInfoUI = new SoldierInfoUI();
systems.Add(achievementSystem);
systems.Add(campSystem);
systems.Add(CharacterSystem);
systems.Add(EnergySystem);
systems.Add(EventSystem);
systems.Add(StageSystem);
systems.Add(CampInfoUI);
systems.Add(gamePauseUI);
systems.Add(GameStateInfoUI);
systems.Add(soldierInfoUI);
systems.ForEach(s => s.Init());
var memento = CareTaker.RetrieveMemento(); //取回备忘录
achievementSystem.RestoreMemento(memento); //根据备忘录，恢复成就系统
}