QT菜单栏工具在状态栏显示功能提示

#include "mainwindow.h"

#include <QMenuBar>
#include <QMessageBox>
#include <QPushButton>
#include <QStatusBar>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QMenuBar *qMenubar = this->menuBar();
    QMenu *qMenu = qMenubar->addMenu("文件");
    QAction *qAction = qMenu->addAction("新建");
    qAction->setShortcut(QKeySequence::New);
    qAction->setStatusTip(tr("鼠标方式去在状态栏显示的提示"));

    //connect(qAction,&QAction::triggered,this,&MainWindow::DealSlot); //无参函数的时候 直接&获取函数指针

    //connect(qAction,SIGNAL(triggered()),this,SLOT(DealSlot())); //使用宏

    void (QAction::*pTriggered)(bool) = &QAction::triggered;
    void (MainWindow::*pDealSlot)() = &MainWindow::DealSlot;
    connect(qAction,pTriggered,this,pDealSlot); //带参数的时候 使用函数指针

    QStatusBar *statusBar = this->statusBar();

}