/// <summary>
/// 工厂方法：获得唯一实例
/// </summary>
/// <returns>屏幕管理器</returns>
public static ScreenManager GetInstance()
{
return ScreenManager.synObject == null ? ScreenManager.synObject = new ScreenManager() : ScreenManager.synObject;
}
/// <summary>
/// 重置唯一实例，用于读取保存数据时
/// </summary>
/// <param name="sm">反序列化后的实例</param>
public static void ResetSynObject(ScreenManager sm)
{
ScreenManager.synObject = sm;
}
/// <summary>
/// 设置场景管理器引用
/// </summary>
public void SetScreenManager(ScreenManager scr)
{
this.Screen = scr;
}