关于重写closeEvent实现根据条件判断是否关闭窗口

protected:
    virtual void closeEvent(QCloseEvent *pEvent);

void Test::closeEvent(QCloseEvent *pEvent)
{
    int iFlag = QMessageBox::warning(this, "关闭窗口”, “确定要关闭？”, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);

    if (QMessageBox::Yes == iFlag)
    {
        pEvent->accept();
    }           
    else
    {
        pEvent->ignore();
    }
}