/// <summary>
/// 读取关卡片段（用于游戏中切换）
/// </summary>
/// <param name="stagePart"></param>
public void LoadStagePart(int part)
{
SwitchStagePart(part);
PartChanged(part, currentStagePartIndex);
CurrentStagePart.Initialize();
}
/// <summary>
/// 读取关卡片段（从该片段开始游戏）
/// </summary>
/// <param name="stagePart"></param>
public virtual void StartFromStagePart(int part)
{
SwitchStagePart(part);
CurrentStagePart.StartFormThis();
CurrentStagePart.Initialize();
}