标签：
m_systemTray = new QSystemTrayIcon(this);
m_systemTray->setIcon(QIcon(":/SystemTray/Resources/ico.png"));
m_systemTray->setToolTip("SystemTray Program");
m_systemTray->show(); 给程序添加图片资源，需要编辑.qrc文件，将图片所在的路径添加进来就可以：<RCC>
<qresource prefix="SystemTray">
<file>Resources/ico.png</file>
</qresource>
</RCC>
效果显示：
Constant Value Description QSystemTrayIcon::Unknown 0 Unknown reason QSystemTrayIcon::Context 1 The context menu for the system tray entry was requested QSystemTrayIcon::DoubleClick 2 The system tray entry was double clicked QSystemTrayIcon::Trigger 3 The system tray entry was clicked QSystemTrayIcon::MiddleClick 4 The system tray entry was clicked with the middle mouse button连接我们自己的槽函数：
connect(m_systemTray, &QSystemTrayIcon::activated, this, &SystemTray::activeTray);//点击托盘，执行相应的动作在槽函数中，分别调用了不同的函数，进行不同的操作：
void SystemTray::activeTray(QSystemTrayIcon::ActivationReason reason)
{
switch (reason)
{
case QSystemTrayIcon::Context:
showMenu();
break;
case QSystemTrayIcon::DoubleClick:
showWindow();
break;
case QSystemTrayIcon::Trigger:
showMessage();
break;
}
} 要实现菜单，我们需要创建一个QMenu并创建自己需要的QAction，添加到QMenu里面，将QMenu设置给QSystemTrayIcon既可。我们可以给每个QAction连接不同的槽函数，执行不同的操作。 m_menu = new QMenu(this);
m_action1 = new QAction(m_menu);
m_action2 = new QAction(m_menu);
m_action1->setText("Show Window");
m_action2->setText("Show Message");
m_menu->addAction(m_action1);
m_menu->addAction(m_action2);
connect(m_action1, &QAction::triggered, this, &SystemTray::showWindow);
connect(m_action2, &QAction::triggered, this, &SystemTray::showMessage);
m_systemTray->setContextMenu(m_menu);
菜单效果： 
void SystemTray::showMessage()
{
m_systemTray->showMessage("Information",//消息窗口标题
"There is a new message!",//消息内容
QSystemTrayIcon::MessageIcon::Information,//消息窗口图标
5000);//消息窗口显示时长
}消息效果：
connect(m_systemTray, &QSystemTrayIcon::messageClicked, this, &SystemTray::showWindow);//点击消息框，显示主窗口主窗口显示：
#ifndef SYSTEMTRAY_H
#define SYSTEMTRAY_H
#include <QtWidgets/QWidget>
#include <QSystemTrayIcon>
#include <QMenu>
class SystemTray : public QWidget
{
Q_OBJECT
public:
SystemTray(QWidget *parent = 0);
~SystemTray();
protected:
void activeTray(QSystemTrayIcon::ActivationReason reason);
void showWindow();//显示窗体
void showMessage();//消息框
void showMenu();//显示菜单
private:
QSystemTrayIcon *m_systemTray;
QMenu *m_menu;
QAction *m_action1;
QAction *m_action2;
};
#endif // SYSTEMTRAY_H
#include "systemtray.h"
SystemTray::SystemTray(QWidget *parent)
: QWidget(parent)
{
m_systemTray = new QSystemTrayIcon(this);
m_menu = new QMenu(this);
m_action1 = new QAction(m_menu);
m_action2 = new QAction(m_menu);
m_action1->setText("Show Window");
m_action2->setText("Show Message");
m_menu->addAction(m_action1);
m_menu->addAction(m_action2);
connect(m_action1, &QAction::triggered, this, &SystemTray::showWindow);
connect(m_action2, &QAction::triggered, this, &SystemTray::showMessage);
m_systemTray->setContextMenu(m_menu);
m_systemTray->setIcon(QIcon(":/SystemTray/Resources/ico.png"));
m_systemTray->setToolTip("SystemTray Program");
m_systemTray->show();
connect(m_systemTray, &QSystemTrayIcon::activated, this, &SystemTray::activeTray);//点击托盘，执行相应的动作
connect(m_systemTray, &QSystemTrayIcon::messageClicked, this, &SystemTray::showWindow);//点击消息框，显示主窗口
}
SystemTray::~SystemTray()
{
}
void SystemTray::activeTray(QSystemTrayIcon::ActivationReason reason)
{
switch (reason)
{
case QSystemTrayIcon::Context:
showMenu();
break;
case QSystemTrayIcon::DoubleClick:
showWindow();
break;
case QSystemTrayIcon::Trigger:
showMessage();
break;
}
}
void SystemTray::showMenu()
{
m_menu->show();
}
void SystemTray::showWindow()
{
this->show();
}
void SystemTray::showMessage()
{
m_systemTray->showMessage("Information",//消息窗口标题
"There is a new message!",//消息内容
QSystemTrayIcon::MessageIcon::Information,//消息窗口图标
5000);//消息窗口显示时长
}#include "systemtray.h"
#include <QtWidgets/QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
SystemTray w;
//w.show();
w.hide();//初始化时，主窗口隐藏，便于观察效果
return a.exec();
}
<RCC>
<qresource prefix="SystemTray">
<file>Resources/ico.png</file>
</qresource>
</RCC>交流 QQ：1245178753标签：
原文地址：http://blog.csdn.net/u011417605/article/details/51322997
