/// <summary>
/// 移除观察者
/// </summary>
/// <param name="observe"></param>
public void Detach(Observe observe)
{
observes.Remove(observe);
}
/// <summary>
/// 增加观察者
/// </summary>
/// <param name="observe"></param>
public void Attach(Observe observe)
{
observes.Add(observe);
}