使用QSystemTrayIcon类可以实现托盘程序。在这里使用QMainWindow做实例：
mainwindow.h头文件
1 #ifndef MAINWINDOW_H 2 #define MAINWINDOW_H 3 4 #include <QMainWindow> 5 #include <QSystemTrayIcon> 6 #include <QAction> 7 #include <QMenu> 8 #include <QCloseEvent> 9 10 namespace Ui { 11 class MainWindow; 12 } 13 14 class MainWindow : public QMainWindow 15 { 16 Q_OBJECT 17 public: 18 explicit MainWindow(QWidget *parent = 0); 19 ~MainWindow(); 20 21 private: 22 void closeEvent(QCloseEvent * event); 23 24 private: 25 Ui::MainWindow *ui; 26 27 QSystemTrayIcon* systemIcon; //系统托盘 28 QAction* min; //最小化 29 QAction* max; //最大化 30 QAction* restore; //还原程序 31 QAction* quit; //退出程序 32 QMenu* menu; //托盘程序的右键目录 33 }; 34 35 #endif // MAINWINDOW_H
mainwindow.cpp 源文件
1 #include <QString> 2 #include "mainwindow.h" 3 #include "ui_mainwindow.h" 4 5 MainWindow::MainWindow(QWidget *parent) : 6 QMainWindow(parent), 7 ui(new Ui::MainWindow) 8 { 9 ui->setupUi(this); 10 11 QIcon icon(":/new/prefix1/images/icon.ico"); 12 systemIcon = new QSystemTrayIcon(this); //托盘程序 13 systemIcon->setIcon(icon); 14 systemIcon->setToolTip(QString::fromLocal8Bit("测试托盘程序")); 15 16 //连接托盘菜单功能到槽函数 17 min = new QAction(QString::fromLocal8Bit("最小化窗口"), this); 18 connect(min, SIGNAL(triggered()), this, SLOT(hide())); 19 max = new QAction(QString::fromLocal8Bit("最大化窗口"), this); 20 connect(max, SIGNAL(triggered()), this, SLOT(showMaximized())); 21 restore = new QAction(QString::fromLocal8Bit("还原窗口"), this); 22 connect(restore, SIGNAL(triggered()), this, SLOT(showNormal())); 23 quit = new QAction(QString::fromLocal8Bit("退出"), this); 24 connect(quit, SIGNAL(triggered()), qApp, SLOT(quit())); 25 26 menu = new QMenu(this); 27 menu->addAction(min); 28 menu->addAction(max); 29 menu->addAction(restore); 30 menu->addSeparator(); 31 menu->addAction(quit); 32 systemIcon->setContextMenu(menu); //设置托盘程序功能菜单 33 systemIcon->show(); 34 } 35 36 MainWindow::~MainWindow() 37 { 38 delete ui; 39 } 40 41 void MainWindow::closeEvent(QCloseEvent *event) 42 { 43 if(systemIcon->isVisible()) 44 { 45 hide(); //隐藏主程序 46 systemIcon->showMessage(QString::fromLocal8Bit("提示"), QString::fromLocal8Bit("测试程序正在后台运行!")); 47 event->ignore(); 48 } 49 }