#include <QApplication> #include <QPushButton> int main(int argc, char *argv[]) { QApplication app(argc, argv); QPushButton *button = new QPushButton("Quit"); QObject::connect(button, SIGNAL(clicked()), &app, SLOT(quit())); button->show(); return app.exec(); }
单击Quit按钮或空格都会退出。
原文：http://www.cnblogs.com/xuyan505/p/5343258.html