qt5QSystemTrayIcon系统托盘

需要  #include <QSystemTrayIcon>

显示系统托盘

win.h

#ifndef WIN_H
#define WIN_H

#include <QDialog>
#include <QSystemTrayIcon>   //系统托盘类
#include <QDebug>

class win : public QDialog
{
    Q_OBJECT

public:
    win(QWidget *parent = nullptr);
    ~win();

private:
    QSystemTrayIcon trayIcon;//创建系统托盘对象
    int i=0;

private slots:
    void trayIconhansu(QSystemTrayIcon::ActivationReason reason);


};
#endif // WIN_H

win.cpp

#include "win.h"

win::win(QWidget *parent)
    : QDialog(parent)
{
    this->resize(600,300);
    this->setWindowFlag(Qt::WindowMinimizeButtonHint);

    trayIcon.setToolTip("系统托盘练习");//设置系统托盘的提示
    QString  ss=trayIcon.toolTip(); // 返回系统托盘的提示
    trayIcon.setIcon(QIcon(":/tu/tupian/home.png"));//设置图标
    trayIcon.setVisible(true);//设置部件是否可见


    QObject::connect(&trayIcon, &QSystemTrayIcon::activated,this,&win::trayIconhansu);
      /*  参数2:QSystemTrayIcon::activated 此信号在用户激活系统托盘时发出
            QSystemTrayIcon::activated信号会向槽函数传递参数，传递激活的动作
            QSystemTrayIcon::Unknown=0      不明原因
            QSystemTrayIcon::Context=1      系统托盘的菜单请求(比如右键菜单)
            QSystemTrayIcon::DoubleClick=2  双击系统托盘
            QSystemTrayIcon::Trigger=3      单击系统托盘
            QSystemTrayIcon::MiddleClick=4  鼠标中键点击系统托盘
    */

    qDebug()<<ss;
}

win::~win()
{
}

void win::trayIconhansu(QSystemTrayIcon::ActivationReason reason)
{
    //系统托盘一般都是单击显示窗口，右击显示菜单
    if(reason==QSystemTrayIcon::Trigger)  //如果动作是单击
    {
        qDebug()<<"i="<<i;
        i++;
        this->showNormal();
}
}