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Qt connect常見使用方式

    QObject::connect(qTimer1,SIGNAL(timeout()),this,SLOT(refreshBtn()));

    QObject::connect(qTimer1,&QTimer::timeout,this,&MainWindow::refreshBtn);

    QObject::connect(action6, &QAction::triggered, [&](){
        ::PostMessage(m_hwndChild, WM_CMD, 0, CMD_ZoomOut);
    });