QMenuBar(QWidget * parent = 0)

QMenu(QWidget * parent = 0)

QMenu(const QString & title, QWidget * parent = 0)

QAction(QObject * parent)

QAction(const QString & text, QObject * parent)

QAction(const QIcon & icon, const QString & text, QObject * parent)

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QMenu>

#include <QMenuBar>

#include <QStatusBar>

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    MainWindow(QWidget *parent = 0);

    ~MainWindow();

    QMenu* menu[10];

    QAction* act[10];

    QMenuBar* menuBar ;

    QStatusBar* status ;

public slots:

    void trigerMenu(QAction* act);

};

#endif // MAINWINDOW_H

#include "mainwindow.h"

#include <Qt>

#include <QtDebug>

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    this->resize(400,300);

    this->centralWidget();

    status = new QStatusBar(this);

    menu[0] = new QMenu("文件");

    menu[0]->addAction("编辑");

    menu[0]->addAction("查看");

    menu[0]->addAction("工具");

    act[0] = new QAction("新建",this);

    act[0]->setShortcut(Qt::CTRL | Qt::Key_A );

    act[0]->setStatusTip("这是一个新建菜单");

    act[1] = new QAction("打开",this);

    act[1]->setCheckable(true);

    menu[1] = new QMenu("保存");

    menu[1]->addAction(act[0]);

    menu[1]->addAction(act[1]);

    menu[2] = new QMenu("打印");

    menu[2]->addAction("打印设置");

    menu[2]->addMenu(menu[1]);

    menuBar = new QMenuBar(this);

    menuBar->addMenu(menu[0]);

    menuBar->addMenu(menu[2]);

    menuBar->setGeometry(0,0,this->width(),30);

    connect(menuBar,SIGNAL(triggered(QAction*)),this,SLOT(trigerMenu(QAction*)));

}

MainWindow::~MainWindow()

{

}

void MainWindow::trigerMenu(QAction* act)

{

    if(act->text() == "新建")

    {

        qDebug()<<"新建菜单被按下";

    }

}

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    MainWindow w;

    w.show();

    return a.exec();

}