QT布局

#include <QApplication>
#include <QPushButton>
#include <QHBoxLayout>

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

QWidget *window = new QWidget;
QPushButton *button1 = new QPushButton("One");
QPushButton *button2 = new QPushButton("Two");
QPushButton *button3 = new QPushButton("Three");
QPushButton *button4 = new QPushButton("Four");
QPushButton *button5 = new QPushButton("Five");

QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(button1);
layout->addWidget(button2);
layout->addWidget(button3);
layout->addWidget(button4);
layout->addWidget(button5);

window->setLayout(layout);
window->show();

return app.exec();

}

#include <QPushButton>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QApplication>

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

QWidget *window = new QWidget;
QPushButton *button1 = new QPushButton("One");
QPushButton *button2 = new QPushButton("Two");
QPushButton *button3 = new QPushButton("Three");
QPushButton *button4 = new QPushButton("Four");
QPushButton *button5 = new QPushButton("Five");

QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(button1);
layout->addWidget(button2);
layout->addWidget(button3);
layout->addWidget(button4);
layout->addWidget(button5);

window->setLayout(layout);
window->show();

return app.exec();

}

#include <QApplication>
#include <QPushButton>
#include <QGridLayout>

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

QWidget *window = new QWidget;
QPushButton *button1 = new QPushButton("One");
QPushButton *button2 = new QPushButton("Two");
QPushButton *button3 = new QPushButton("Three");
QPushButton *button4 = new QPushButton("Four");
QPushButton *button5 = new QPushButton("Five");
QPushButton *button6 = new QPushButton("Six");

QGridLayout *layout = new QGridLayout;
layout->addWidget(button1, 0 ,0);
layout->addWidget(button2, 0, 1);
layout->addWidget(button3, 1, 0);
layout->addWidget(button4, 1, 1);//注意这几行
layout->addWidget(button5, 2, 0);
layout->addWidget(button6, 2, 1);

window->setLayout(layout);
window->show();

return app.exec();

}