Qt 两个lineEdit 判断焦点问题

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    QButtonGroup *m_buGroup = new QButtonGroup(this);//按钮组

    ui->pushButton1->setFocusPolicy(Qt::NoFocus);//设置按钮无焦点

    ui->pushButton2->setFocusPolicy(Qt::NoFocus);//设置按钮无焦点

    m_buGroup->addButton(ui->pushButton1,1);//添加按钮到

    m_buGroup->addButton(ui->pushButton2,3);//添加按钮到

    QObject::connect(m_buGroup, SIGNAL(buttonClicked(int)),this, SLOT(buttonNumslot(int)));

}

void Widget::buttonNumslot(int bn)
{
    if(ui->lineEdit->hasFocus())//输入框1焦点
    {
        ui->lineEdit->insert(QString::number(bn));
    }
     else if(ui->lineEdit_2->hasFocus())//输入框2焦点
    {
        ui->lineEdit_2->insert(QString::number(bn));
    }
}
按下pushButton1输入1，按下pushButton2输入3，改选lineEdit_2后则输入到lineEdit中