Qt在系统托盘中为应用程序提供图标。

主要用到 QSystemTrayIcon 

头文件中增加如下代码，

//QSystemTrayIcon任务栏托盘菜单
private:
    QSystemTrayIcon *myTrayIcon;
    QMenu *myMenu;
    QAction *restoreWinAction;
    QAction *quitAction;
    void createMenu();
private slots:
    void showNormalSlot();

源文件代码：

void MainWindow::createMenu()
{    
    restoreWinAction = new QAction("recover(&R)",this);    
    quitAction = new QAction("quit(&Q)",this);    
    //恢复   
    connect(restoreWinAction,SIGNAL(triggered()),this,SLOT(showNormalSlot()));    
    //退出    
    connect(quitAction,SIGNAL(triggered()),qApp,SLOT(quit()));    
    myMenu = new QMenu((QWidget*)QApplication::desktop());   
    //添加菜单    
    myMenu->addAction(restoreWinAction);    
    //分隔符    
    myMenu->addSeparator();    
    myMenu->addAction(quitAction);
}

构造函数中添加如下代码：

    //QSystemTrayIcon任务栏托盘菜单    
    //菜单    
    createMenu();