Qt slider和spinbox练习

#include <QApplication>
#include <QHBoxLayout>
#include <QSpinBox>
#include <QSlider>

int main(int argc,char *argv[])
{
QApplication app(argc,argv);

QWidget *window = new
QWidget;//QWidget窗口控件是这个应用程序的主窗口，顶层窗口
window->setWindowTitle("Enter your
age!");

QSpinBox *spinBox = new QSpinBox;
QSlider *slider = new QSlider(Qt::Horizontal);
spinBox->setRange(0,130);
slider->setRange(0,130);

QObject::connect(spinBox,SIGNAL(valueChanged(int)),slider,SLOT(setValue(int)));
//将spinBox的数值传向slider信号槽

QObject::connect(slider,SIGNAL(valueChanged(int)),spinBox,SLOT(setValue(int)));//将slider的数值传向spinBox信号槽

spinBox->setValue(35);//默认为35岁

QHBoxLayout *layout = new QHBoxLayout();
layout->addWidget(spinBox);
layout->addWidget(slider);
window->setLayout(layout);

window->show();
return app.exec();

}