1，
#include <QApplication>
#include <Qlabel>
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
// QLabel lbInfo("Hello,World",0);
QLabel *lbInfo = new QLabel("Hello,World",0);
// lbInfo.show();
lbInfo->show();
return app.exec();
}
2，
#include <QApplication>
#include <QPushButton>
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
// QPushButton btnOk("OK",0);
QPushButton *btnOk = new QPushButton("OK",0);
btnOk->resize(300,200);
QObject::connect(btnOk,SIGNAL(clicked()),&app,SLOT(quit()));//信号与槽联系起来
btnOk->show();
return app.exec();
}
3，
#include <QApplication>
#include <QWidget>
#include <QSlider>
#include <QSpinbox.h>
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
QWidget *centralwidget = new QWidget(0);
QSpinBox *spBox = new QSpinBox(centralwidget);
QSlider *slider = new QSlider(Qt::Horizontal,centralwidget);
spBox->setGeometry(QRect(20, 20, 44, 22));
slider->setGeometry(QRect(90, 20, 160, 21));
spBox->setRange(0,140);
slider->setRange(0,140);
QObject::connect(spBox,SIGNAL(valueChanged(int)),slider,SLOT(setValue(int)));//信号与槽联系起来
QObject::connect(slider,SIGNAL(valueChanged(int)),spBox,SLOT(setValue(int)));//信号与槽联系起来
spBox->setValue(32);
centralwidget->show();
return app.exec();
}
本文转自Phinecos(洞庭散人)博客园博客，原文链接：http://www.cnblogs.com/phinecos/archive/2007/04/30/733696.html，如需转载请自行联系原作者
