qt signal-slot测试代码

#include "dialog.h" #include "subdialog.h" #include<QGridLayout> #include<QDebug> Dialog::Dialog(QWidget *parent) : QDialog(parent) { button = new QPushButton(QObject::tr("subdialog")); line = new QLineEdit; QGridLayout *layout1 = new QGridLayout; layout1->addWidget(button); layout1->addWidget(line); setLayout(layout1); connect(button, SIGNAL(clicked()), this, SLOT(slot_button_clicked())); dialog1 = new subdialog(this); connect(dialog1, SIGNAL(signal_subdialog(int, int)), this, SLOT(slot_receive(int, int))); setWindowTitle("maindialog"); } Dialog::~Dialog() { } void Dialog::slot_button_clicked() { //dialog1 = new subdialog(this); dialog1->exec(); } void Dialog::slot_receive(int tmp1, int tmp2) { shownumber1 = tmp1; shownumber2 = tmp2; qDebug("OK"); qDebug()<<shownumber1<<shownumber2; line->setText(QString("receive number is %1 and %2").arg(shownumber1).arg(shownumber2)); }