qt removeWidget(删除布局内…

//从布局中移除

m_hlayout->removeWidget(widget_to_remove);

 widget_to_remove->hide();

//展示新布局

m_hlayout->addWidget(widget_to_add);

widget_to_add->show();参考：

零基础学Qt4编程之删除布局内窗口部件的方法 - qter_wd007的专栏 - 博客频道 - CSDN.NET
http://blog.csdn.net/qter_wd007/article/details/5659684