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

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