使用UIMgr打开一个窗口时，抛出事件，从而让GuideMgr知道自己是否需要开始进行引导。

在UIMgr中添加API

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private Action<string> _showAction;
private Action<string> _hideAction;
public void AddShowListener(Action<string> listener)
{
    _showAction += listener;
}
public void RemoveShowListener(Action<string> listener)
{
    if (_showAction != null) 
        _showAction -= listener;
}
public void AddHideListener(Action<string> listener)
{
    _hideAction += listener;
}
public void RemoveHideListener(Action<string> listener)
{
    if (_hideAction != null)
        _hideAction -= listener;
}

public IView Show(string path)
{
    //...
    if (view != null)
    {
        //...

        _showAction?.Invoke(path);//+++
    }
    return view;
}

public void Hide(string name)
{
    HideAll(_viewsDic[name]);
    _hideAction?.Invoke(name);//+++
}
public Transform GetCurViewTrans()
{
    string curView = _uiStack.Peek();
    return GetViewTrans(curView);
}

修改Show和Back方法对于HideAll的调用，把它们改成Hide，这里略。