Qt tcp client程序

用Qt写了个简单的Tcp客户端程序。



工程名client；

1> client.pro中不要忘了加入：

QT   += network

2> mainwindow.h

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QtNetwork/QTcpSocket>

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

Q_OBJECT

public:

explicit MainWindow(QWidget *parent = 0);

~MainWindow();

private slots:

void on_connectBtn_clicked();

void connectedSlot();

void disconnectedSlot();

void readyReadSlot();

void errorSlot(QAbstractSocket::SocketError);

void on_sendBtn_clicked();

void on_clearBtn_clicked();

private:

Ui::MainWindow *ui;

QTcpSocket *socket_;

bool isConnected_;

};

#endif // MAINWINDOW_H

2> mainwindow.cpp

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QMessageBox>

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow),

isConnected_(false)

{

ui->setupUi(this);

socket_ = new QTcpSocket(this);

connect(socket_, SIGNAL(connected()), this, SLOT(connectedSlot()));

connect(socket_, SIGNAL(disconnected()), this, SLOT(disconnectedSlot()));

connect(socket_, SIGNAL(readyRead()), this, SLOT(readyReadSlot()));

connect(socket_, SIGNAL(error(QAbstractSocket::SocketError)), this,

SLOT(errorSlot(QAbstractSocket::SocketError)));

}

MainWindow::~MainWindow()

{

delete socket_;

delete ui;

}

void MainWindow::connectedSlot()

{

isConnected_ = true;

}

void MainWindow::disconnectedSlot()

{

isConnected_ = false;

socket_->close();

}

void MainWindow::readyReadSlot()

{

QByteArray message = socket_->readAll();

ui->recvEdit->append(message);

}

void MainWindow::errorSlot(QAbstractSocket::SocketError)

{

QMessageBox::information(this, "show", socket_->errorString());

disconnectedSlot();

}

void MainWindow::on_connectBtn_clicked()

{

socket_->connectToHost(ui->addressEdit->text(), ui->portEdit->text().toInt());

}

void MainWindow::on_sendBtn_clicked()

{

if (isConnected_) {

QString str = ui->sendEdit->text();

socket_->write(str.toLatin1().data(), str.length());

} else {

QMessageBox::information(this, "show", "unconnected");

}

}

void MainWindow::on_clearBtn_clicked()

{

ui->recvEdit->clear();

}

3> 上面代码中使用了mainwidnow.ui见名之意应该很容易理解。