c++ - 在qt中添加菜单栏时出错

Question

我试图在 QDialog 中添加菜单栏，但出现以下错误:

error: 'class Qt_Stackwidget' has no member named 'menuBar'
         QMenuBar* menubar = this->menuBar();

我很困惑为什么会这样。查了一下QDialog没有函数function named menuBar()。如何将菜单栏添加到 QDialog。谁能帮我解决这个问题？

Answer 1

你可以像这样添加一个菜单栏:

#include <QtGui>

class Dialog : public QDialog
{
public:
    Dialog(QWidget *parent = 0) : QDialog(parent)
    {
        QVBoxLayout *layout = new QVBoxLayout;
        setLayout(layout);

        QMenu *menu = new QMenu("File");
        menu->addAction("Exit");

        QMenuBar *menubar = new QMenuBar();
        menubar->addMenu(menu);

        layout->setMenuBar(menubar);
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QPushButton *button = new QPushButton("Button");

    Dialog *dialog = new Dialog;
    dialog->layout()->addWidget(button);
    dialog->show();

    return app.exec();
}