Qt5_TCP_Client01

Posted 2020-08-20 CppSkill

ZC: 代码来自<<Qt及Qt Quick开发实战精解>>“代码\src\5\5-3”（“代码\src\5\5-4”里面的代码差不多，不知有何差别...貌似应该是更为完善）

ZC: 这是 Qt5 TCP客户端 简单测试类

1、TtcpClient.h

#ifndef TTCPCLIENT_H
#define TTCPCLIENT_H

#include <QObject>
#include <QTcpSocket>

class TtcpClient : public QObject
{
    Q_OBJECT
public:
    explicit TtcpClient(QObject *parent = 0);

signals:

public slots:

public:
    QTcpSocket *FsktTcp;
public:
    void NewConnectZ(QString _strDestIP, qint16 _iDestPort);// 创建新连接
    void AbortZ();// 取消
    void CloseZ();// 关闭
  // ***
    void WriteZ();// 发送数据
public slots:
    void ReadyReadZ();// 读取数据
    void SocketErrorZ(QAbstractSocket::SocketError _socketError);// 错误处理
};

#endif // TTCPCLIENT_H

2、TtcpClient.cpp

#include "TtcpClient.h"

#include <QDebug>
#include <QHostAddress>
#include <QDataStream>

TtcpClient::TtcpClient(QObject *parent) : QObject(parent)
{
    FsktTcp = new QTcpSocket(this);

    // 错误处理
    connect(FsktTcp, SIGNAL(QAbstractSocket::error(SocketError)),
            this, SLOT(SocketErrorZ(QAbstractSocket::SocketError)));
    // 读取数据
    connect(FsktTcp, SIGNAL(readyRead()), this, SLOT(ReadyReadZ()));
}


// 创建新连接
void TtcpClient::NewConnectZ(QString _strDestIP, qint16 _iDestPort)
{
    FsktTcp->abort();
    QHostAddress ha(_strDestIP);
    FsktTcp->connectToHost(ha, _iDestPort);
}

// 取消
void TtcpClient::AbortZ()
{
    FsktTcp->abort();
}

// 关闭
void TtcpClient::CloseZ()
{
    FsktTcp->close();
}

// 错误处理
void TtcpClient::SocketErrorZ(QAbstractSocket::SocketError _socketError)
{
    switch(_socketError)
    {
    case QAbstractSocket::RemoteHostClosedError :
    {
        qDebug() << "Remote host closed .";
        break;
    }
    default : qDebug() << FsktTcp->errorString();
    }
}

// 读取数据
void TtcpClient::ReadyReadZ()
{
    QDataStream in(FsktTcp);
    in.setVersion(QDataStream::Qt_5_5);

    QByteArray baRead = FsktTcp->readAll();

    qDebug() << QString::fromLocal8Bit(baRead);
// 接收完毕，就关闭socket
}

// 发送数据
void TtcpClient::WriteZ()
{
    QByteArray outBlock;
    outBlock = outBlock.append("test out");

    QDataStream out(&outBlock, QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_5_5);

    //qDebug() << outBlock.size();
    //out.

    // 发送数据
    FsktTcp->write(outBlock);
}

3、