qt-进度条显示控件dome

void Widget::Init(){

     num=0;

    connect(ui->a,SIGNAL(clicked(bool)),this,SLOT(on_a_clicked()));//开始读条

    connect(ui->b,SIGNAL(clicked(bool)),this,SLOT(on_b_clicked()));//停止读条

    mytime=new QTimer(this);

    connect(mytime,SIGNAL(timeout()),this,SLOT(on_tomer()));//定时器

}

void Widget::on_a_clicked()

{

    qDebug()<<"a"<<endl;

    mytime->start(100);//开始及时间刻度

}

void Widget::on_b_clicked()

{

    qDebug()<<"b"<<endl;

    mytime->stop();//停止

}

void Widget::on_tomer()

{

 num++;

 ui->ss->setValue(num);

}