Qt自绘菜单栏和工具栏

用到的头文件

#include <QMenu>
#include <QToolBar>
#include <QMenuBar>
#include <QAction>    

QMenu *fileMenu, *editMenu, *helpMenu;  //定义三个菜单选项  
QToolBar *fileToolBar, *editToolBar;//两个工具栏
QAction *newAct, *cutAct, *copyAct, *pasteAct, *aboutQtAct;//五个动作

void newFileSlot();//一个槽函数，对应打开动作

.cpp文件

    fileMenu = new QMenu(this);

    editMenu = new QMenu(this);

    helpMenu = new QMenu(this);

    //填充菜单子节点

    newAct = new QAction(QIcon( ":/images/new" ), tr( "new" ), this );

    newAct->setShortcut(tr("Ctrl+N" ));

    newAct->setStatusTip(tr("newFile" ));

    connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));

    cutAct = new QAction(QIcon( ":/images/cut" ), tr( "cut" ), this );

    cutAct->setShortcut(tr("Ctrl+X" ));

    cutAct->setStatusTip(tr("cutContent" ));

    copyAct = new QAction(QIcon( ":/images/copy" ), tr( "copy" ), this );

    copyAct->setShortcut(tr("Ctrl+C" ));

    copyAct->setStatusTip(tr("copyContent" ));

    pasteAct = new QAction(QIcon( ":/images/paste" ), tr( "paste" ), this );

    pasteAct->setShortcut(tr("Ctrl+V" ));

    pasteAct->setStatusTip(tr("pasteContent" ));

    aboutQtAct = new QAction(tr( "about Qt" ), this );

    aboutQtAct->setStatusTip(tr("about Qt information" ));

    //填充菜单

    fileMenu = menuBar()->addMenu(tr( "file" ));

    fileMenu->addAction(newAct);

    fileMenu->addSeparator();

    editMenu = menuBar()->addMenu(tr("edit" ));

    editMenu->addAction(cutAct);

    editMenu->addAction(copyAct);

    editMenu->addAction(pasteAct);

    menuBar()->addSeparator();

    helpMenu = menuBar()->addMenu(tr("help" ));

    helpMenu->addAction(aboutQtAct);

    //toolBar 工具条

    fileToolBar = addToolBar(tr("create"));

    fileToolBar->addAction(newAct);

    editToolBar = addToolBar(tr("change"));

    editToolBar->addAction(cutAct);

    editToolBar->addAction(copyAct);

    editToolBar->addAction(pasteAct);

    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

    connect(newAct, &QAction::triggered, this, &MainWindow::newFileSlot);

槽函数定义：

//子菜单事件

void MainWindow::newFileSlot()

{

    QMessageBox::warning(this,tr("Warning"),tr("Do you want to create new file?"),QMessageBox::Yes | QMessageBox::Default,QMessageBox::No);

}