框架结构

QList<QToolButton *> btns = ui->widget_left->findChildren<QToolButton *>();
    foreach (QToolButton * btn, btns) {
        connect(btn, SIGNAL(clicked()), this, SLOT(button_clicked()));
    }
    ui->b_alarm->click();




void FrmAlarm::button_clicked()
{

    QToolButton *btn = (QToolButton *)sender();
    QString name = btn->text();

    if (name == "网关配置") {
        ui->stackedWidget->setCurrentIndex(0);
        ui->b_gateway->setChecked(true);
        ui->b_node->setChecked(false);
        ui->b_alarm->setChecked(false);
        ui->b_contral->setChecked(false);

    } else if (name == "节点配置") {
        ui->stackedWidget->setCurrentIndex(1);
        ui->b_gateway->setChecked(false);
        ui->b_node->setChecked(true);
        ui->b_alarm->setChecked(false);
        ui->b_contral->setChecked(false);

    } else if (name == "控制节点") {
        ui->stackedWidget->setCurrentIndex(2);
        ui->b_gateway->setChecked(false);
        ui->b_node->setChecked(false);
        ui->b_alarm->setChecked(false);
        ui->b_contral->setChecked(true);

    } else if (name == "预警配置") {
        ui->stackedWidget->setCurrentIndex(3);
        ui->b_gateway->setChecked(false);
        ui->b_node->setChecked(false);
        ui->b_alarm->setChecked(true);
        ui->b_contral->setChecked(false);

    }

}