点击任务按钮 调用OnPushPanel 方法入栈任务面板 

却判断 栈为空 又重新new 一个栈

执行不到 panelStack.Count > 0的情况

什么问题啊？

public void PushPanel(UIPanelType panelType)
    {
        if (panelStack == null)
        {
            panelStack = new Stack<BasePanel>();
            Debug.Log("New栈");
        }
            
        Debug.Log("1:"+panelStack.Count);
        if (panelStack.Count > 0)
        {
            BasePanel topPanel = panelStack.Peek();
            topPanel.OnPause();
            Debug.Log("OnPause");
        }
        BasePanel panel = GetPanel(panelType);
        panel.OnEnter();
        panelStack.Push(panel);
        Debug.Log(panelStack.Count);
    }