qt，调试结果和.exe执行结果不一样

Question

设计实现qt界面最小化到托盘，调试结果正常，直接点击exe文件运行程序正常运行，最小化后进入后台但是托盘没有出现图标

这是.h
#include <QMainWindow>
#include <QPushButton>
#include <QSystemTrayIcon>
#include <QHideEvent>
 
namespace Ui {
class MainWindow;
}
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
 void hideEvent(QHideEvent *event)；
private:
    Ui::MainWindow *ui;
    QSystemTrayIcon *trayIcon;
    QMenu *trayIconMenu;
    //窗口管理动作
    QAction *minimizeAction;
    QAction *maximizeAction;
    QAction *restoreAction;
    QAction *quitAction;
 
private slots:
    void iconActivated(QSystemTrayIcon::ActivationReason reason);
};




这是.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    //托盘初始化
    QIcon icon = QIcon("icon.png");
    trayIcon = new QSystemTrayIcon(this);
    trayIcon->setIcon(icon);
    trayIcon->setToolTip("a trayicon example");
    trayIcon->show(); //必须调用，否则托盘图标不显示
 
    //创建菜单项动作(以下动作只对windows有效)
    minimizeAction = new QAction("最小化~", this);
    connect(minimizeAction, SIGNAL(triggered()), this, SLOT(hide())); //绑定信号槽
 
    maximizeAction = new QAction("最大化~", this);
    connect(maximizeAction, SIGNAL(triggered()), this, SLOT(showMaximized()));
 
    restoreAction = new QAction("还原~", this);
    connect(restoreAction, SIGNAL(triggered()), this, SLOT(showNormal()));
 
    quitAction = new QAction("退出~", this);
    connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit())); //关闭应用，qApp对应的是程序全局唯一指针
 
    //创建托盘菜单(必须先创建动作，后添加菜单项，还可以加入菜单项图标美化)
    trayIconMenu = new QMenu(this);
    trayIconMenu->addAction(minimizeAction);
    trayIconMenu->addAction(maximizeAction);
    trayIconMenu->addAction(restoreAction);
    trayIconMenu->addSeparator();
    trayIconMenu->addAction(quitAction);
    trayIcon->setContextMenu(trayIconMenu);
 
 
    connect(trayIcon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
            this,SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
 
 
}
void MainWindow::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
    switch (reason)
    {
    case QSystemTrayIcon::Trigger:
        trayIcon->showMessage("title","你单击了"); //后面两个默认参数
        break;
    case QSystemTrayIcon::DoubleClick:
        trayIcon->showMessage("title","你双击了");
        break;
    case QSystemTrayIcon::MiddleClick:
        trayIcon->showMessage("title","你中键了");
        break;
    default:
        break;
    }
 
}
 
 
MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::hideEvent(QHideEvent *event)
{
    if(trayIcon->isVisible())
    {
        hide(); //隐藏窗口
        trayIcon->showMessage("title","隐藏到托盘图标了"); //提示用户隐藏到了托盘
        event->ignore(); //忽略事件
    }
}