tcp client using signal and slot

เพื่อให้เราไม่พลาดการสื่อสาร จำเป็นต้องใช้ signal and slot


========================================
============== signalSocket.pro ===============
========================================QT -= gui
QT += network

CONFIG += c++11 console
CONFIG -= app_bundle

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += main.cpp \
    sockettest.cpp

HEADERS += \
    sockettest.h

target.path = /home/pi/Pump
INSTALLS += target



========================================
================ main.cpp =================
========================================#include <QCoreApplication>
#include <sockettest.h>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    SocketTest mTest;
    mTest.Test();

    return a.exec();
}


========================================
=============== sockettest.h =================
========================================#ifndef SOCKETTEST_H
#define SOCKETTEST_H

#include <QObject>
#include <QDebug>
#include <QTcpSocket>
#include <QAbstractSocket>

class SocketTest : public QObject
{
    Q_OBJECT
public:
    explicit SocketTest(QObject *parent = nullptr);
    void Test();

signals:

public slots:
    void connected();
    void disconnected();
    void bytesWritten (qint64 bytes);
    void readyRead();

private:
    QTcpSocket *socket;
};

#endif // SOCKETTEST_H




========================================
============== sockettest.cpp =================
========================================
#include "sockettest.h"

SocketTest::SocketTest(QObject *parent) : QObject(parent)
{

}

void SocketTest::Test(){
    socket = new QTcpSocket(this);
    connect(socket,SIGNAL(connected()),this,SLOT(connected()));
    connect(socket,SIGNAL(disconnected()),this,SLOT(disconnected()));
    connect(socket,SIGNAL(readyRead()),this,SLOT(readyRead()));
    connect(socket,SIGNAL(bytesWritten(qint64)),this,SLOT(bytesWritten(qint64)));

    qDebug() << "Connecting...";
    //socket->connectToHost("voidrealms.com",80);
    socket->connectToHost("10.0.0.227",1234);
    if(!socket->waitForConnected(1000)){
        qDebug() << "Error " << socket->errorString();
    }
}

void SocketTest::connected()
{
    qDebug() << "Connected";
}

void SocketTest::disconnected()
{
    qDebug() << "Disconnected";
    socket->close();
}

void SocketTest::bytesWritten (qint64 bytes)
{
    qDebug() << "we wrote: " << bytes;
}

void SocketTest::readyRead()
{
    qDebug() << "Reading...";
    qDebug() << socket->readAll();
}

ที่มา
https://www.youtube.com/watch?v=j9uAfTAZrdM