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();

}