//托盘  	QIcon icon = QIcon("icon/icon.png");	this->setWindowIcon(icon);	tray = new QSystemTrayIcon(this);	tray->setIcon(icon);	tray->setToolTip("KKPlayer");	connect(tray, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(slot_tray(QSystemTrayIcon::ActivationReason)));void MainWindow::slot_tray(QSystemTrayIcon::ActivationReason reason){	//触发后台图标执行相应事件  	switch (reason)	{	case QSystemTrayIcon::Trigger:/*单击*/	{									  tray->hide();									  this->show();	}	default:		break;	}}