一. Qt 模态对话框
先让我们来看看对话框的几种特性:
1.Qt::NonModa
The window is not modal and does not block input to other windows.2.Qt::WindowModal
The window is modal to a single window hierarchy and blocks input to its parent window, all grandparent windows, and all siblings of its parent and grandparent windows.3.Qt::ApplicationModal
The window is modal to the application and blocks input to all windows.可以看出，比较常用的exec()方法显示的对话框是属于第三种：Qt::ApplicationModal，这种对话框无法接受除了自身之外的任何其他对象的输入，而第二种Qt::WindowModal是可以接受QApplication的输入，所以我们只需将其改为第二种即可。
二. 实现
我们只需在显示键盘之前添加如下代码:
1 if(qGuiApp>focusWindow()>isModal()) 2 qGuiApp>focusWindow()>setModality(Qt::WindowModal);上一篇：Qt 如何清空layout中所有控件
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Qt
