qt滚动条与调整框联动

#include "mainwindow.h"

#include <QApplication>

#include<QSlider>

#include<QSpinBox>

#include<QWidget>

#include<QLayout>

int main(int argc, char *argv[])

{
  
  

    QApplication a(argc, argv);

    QWidget *wiget = new QWidget;

    wiget->setWindowTitle("Layout Test");

    QSpinBox *spin =new QSpinBox;

    QSlider *slider =new QSlider;

    spin->setRange(0,100);

    slider->setRange(0,100);

    QObject::connect(spin,SIGNAL(valueChanged(int)),slider,SLOT(setValue(int)));

    QObject::connect(slider,SIGNAL(valueChanged(int)),spin,SLOT(setValue(int)));

    spin->setValue(10);

    QHBoxLayout *layout=new QHBoxLayout;

    layout->addWidget(spin);

    layout->addWidget(slider);

    wiget->setLayout(layout);

    wiget->show();

    return a.exec();

}