接上篇关于connect函数的研究：
代码如下：
#ifndef FATHERDIALOG_H
#define FATHERDIALOG_H
#include <QDialog>
namespace Ui {
class FatherDialog;
}
class FatherDialog : public QDialog
{
Q_OBJECT
public:
explicit FatherDialog(QWidget *parent = 0);
~FatherDialog();
private slots:
void on_pushButton_clicked();
void showChildDialog();
private:
Ui::FatherDialog *ui;
};
#endif // FATHERDIALOG_H
//fatherdialog.h
#include "fatherdialog.h"
#include "ui_fatherdialog.h"
#include <QMessageBox>
FatherDialog::FatherDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::FatherDialog)
{
ui->setupUi(this);
QObject::connect(ui->childB,
&QPushButton::clicked,
this,
&FatherDialog::showChildDialog);
}
FatherDialog::~FatherDialog()
{
delete ui;
}
void FatherDialog::on_pushButton_clicked()
{
QMessageBox::information(this,"提示","<font size='26'>请告诉我为什么</font>",QMessageBox::Ok);
}
void FatherDialog::showChildDialog()
{
QDialog * d= new QDialog(this);
d->show();
}
//main.cpp
#include "fatherdialog.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
FatherDialog w;
w.show();
return a.exec();
}