为什么不能将QGridLayout添加到QMainWindow? [英] Why can't I add a QGridLayout to a QMainWindow?

问题描述

我创建了一个 QMainWindow 类.我为主布局编写了 QGridLayout ，但是每当我添加 setLayout(grid); 时，都会出现此错误:

I've created a QMainWindow class. I coded a QGridLayout for the main layout, but whenever I add setLayout(grid); this error comes up:

QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout

据我所知，我之前没有在代码中添加任何布局.

As far as I know, I haven't added any sort of layout in my code before.

我正在使用Qt Creator和Linux(ubuntu 12.10).

I'm using Qt Creator and using Linux (ubuntu 12.10).

推荐答案

您可以做的是创建一个QWidget，将其设置为中央窗口小部件，并为其进行布局.QMainWindow已经有它自己的布局来放置状态栏和主菜单，因此您不能直接设置另一个.

What you can do is create a QWidget set it as the central widget and give this one a layout. QMainWindow has its own layout already to place statusbar and mainmenu thus you can't set another one directly.

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