// TQZTeacher.h (TQZTeacher.cpp同上篇文章)
#ifndef TQZTEACHER_H
#define TQZTEACHER_H
#include <QObject>
class TQZTeacher : public QObject
{
Q_OBJECT
public:
explicit TQZTeacher(QObject *parent = nullptr);
signals:
// 自定义信号都写在这下面;
// 且信号无返回值, 只需要声明不需实现;
// 可以有参数, 可以重载;
void hungry();
void hungry(QString foodName);
public slots:
};
#endif // TQZTEACHER_H
// TQZStudent.h
#ifndef TQZSTUDENT_H
#define TQZSTUDENT_H
#include <QObject>
class TQZStudent : public QObject
{
Q_OBJECT
public:
explicit TQZStudent(QObject *parent = nullptr);
signals:
public slots:
void treat();
void treat(QString foodName);
};
#endif // TQZSTUDENT_H
// TQZTeacher.cpp
#include "TQZStudent.h"
#include <QDebug>
TQZStudent::TQZStudent(QObject *parent) : QObject(parent)
{
}
void TQZStudent::treat() {
qDebug() << __func__;
}
void TQZStudent::treat(QString foodName) {
qDebug() << __func__ << foodName.toUtf8().data();
}
// Widget.cpp (Widget.h 同上篇文章)
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
this->teacher = new TQZTeacher(this);
this->student = new TQZStudent(this);
// connect(this->teacher, &TQZTeacher::hungry, this->student, &TQZStudent::treat);
// this->classIsOver();
void(TQZStudent:: *studentFunction)(QString) = &TQZStudent::treat;
void(TQZTeacher:: *teacherFunction)(QString) = &TQZTeacher::hungry;
connect(this->teacher, teacherFunction, this->student, studentFunction);
this->classIsOver();
}
void Widget::classIsOver() {
// 触发 this->teacher 的 hungry 方法;
// emit this->teacher->hungry();
emit this->teacher->hungry(QString("dongdamen shaokao."));
}
Widget::~Widget()
{
delete ui;
}