按下葫芦起了瓢

bug一个接一个

if (changeElementValueButton==nullptr)
    {
        changeElementValueButton = new QPushButton;
        changeElementValueButton->setMaximumWidth(22);
        changeElementValueButton->setFixedWidth(22);

        connect(changeElementValueButton,SIGNAL(clicked()),this,SLOT(OnSelectDataButtonClick()));

        advancePropertyQTableWidget->setCellWidget(0, 2, changeElementValueButton);
    }

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