Qt里的spin控件

#include <QApplication> 
#include <QHBoxLayout> 
#include <QSlider> 
#include <QSpinBox> 
#include <QLabel> 
 
int main( int argc,  char *argv[]) 
{    
    QApplication app(argc, argv); 
 
    QWidget *window =  new QWidget; 
    window->setWindowTitle( "Enter Your Age"); //标题显示:输入你的年龄 
 
    QSpinBox *spinBox =  new QSpinBox; 
    QSlider *slider =  new QSlider(Qt::Horizontal); //滑块组件 
    spinBox->setRange(0, 130); //设置各自的取值范围 
    slider->setRange(0, 130); 
 
     //滑块和Spin组件的值的变化都会对应的改变 
    QObject::connect(spinBox, SIGNAL(valueChanged( int)), 
                                     slider, SLOT(setValue( int))); 
    QObject::connect(slider, SIGNAL(valueChanged( int)), 
                                     spinBox, SLOT(setValue( int))); 
                                        
    spinBox->setValue(35); //注意这里的设置也会影响slider 
 
    QHBoxLayout *layout =  new QHBoxLayout; 
    layout->addWidget(spinBox); 
    layout->addWidget(slider); 
     
    QLabel* label= new QLabel( "your age:"); 
     
    QVBoxLayout* mainLayout= new QVBoxLayout; 
    mainLayout->addWidget(label); 
    mainLayout->addLayout(layout); 
     
    window->setLayout(mainLayout); 
 
    window->resize(300,50); 
    window->show(); 
 
     return app.exec(); 
}