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 
     
      #include 
      
       class TtcpClient : public QObject{    Q_OBJECTpublic:    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 
     
      #include 
      
       #include 
       
        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);}
       
      
     

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