QT: 手工布局并关联QSpin和QSlider

1.创建一个控制台工程LayoutWidgets

2. 修改工程文件

QT += gui widgets

3. 修改主程序main.cpp如下,

#include <QApplication>

#include <QHBoxLayout>

#include <QSlider>

#include <QSpinBox>

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

{
  

    QApplication a(argc, argv);

    QWidget *window = new QWidget();

    window->setWindowTitle("Enter your Age");

    QSpinBox *spinBox = new QSpinBox;

    QSlider *slider = new QSlider(Qt::Horizontal);

    spinBox->setRange(0,150);

    slider->setRange(0,150);

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

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

    spinBox->setValue(45);

    QHBoxLayout *layout = new QHBoxLayout;

    layout->addWidget(spinBox);

    layout->addWidget(slider);

    window->setLayout(layout);

    window->resize(300,80);

    window->show();

    return a.exec();

}

4. 运行结果，