QT5.10+VS2013 TCP 一对一简单C/S架构通信

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QT~俺老孙又回来啦~

买的那本书上面关于tcp的内容就七八页,而且都是过于简单的东西,想进一步就要度娘很久很麻烦,还是喜欢看书(嘿嘿嘿~)

大致的思路就是两个项目,一个client一个server

server监听端口,client建立socket,向目标IP端口发数据.....

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先放server的

.h

serverclass tcp_test : public QMainWindow
{
    Q_OBJECT
private:
    QLabel *LabListen;
    QLabel *LabSocketState;
    QTcpServer *tcpServer;
    QTcpSocket *tcpSocket;

    QString getLocalIP();
public:
    tcp_test(QWidget *parent = Q_NULLPTR);
    private slots:
    void onNewConnection();
    void onSocketStateChange(QAbstractSocket::SocketState socketState);
    void onClientConnected();
    void onClientDisconnevted();
    void onSocketReadyRead();

    void slot_actStart();
    void slot_actStop();
    void slot_btnSend();
private:
    Ui::tcp_testClass ui;
}

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.cpp

#include "tcp_test.h"

tcp_test::tcp_test(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
    LabListen = new QLabel(QString::fromLocal8Bit(" 监听状态:"));
    LabListen->setMinimumWidth();
    ui.statusBar->addWidget(LabListen);

    LabSocketState = new QLabel(QString::fromLocal8Bit("Socket状态:"));
    LabSocketState->setMinimumWidth();
    ui.statusBar->addWidget(LabSocketState);

    QString localIP = getLocalIP();
    this->setWindowTitle("Server     -- local IP :" + localIP);
    ui.comboIP->addItem(getLocalIP());

    ui.btnSend->setEnabled(false);

    tcpServer = new QTcpServer(this);

    connect(tcpServer, SIGNAL(newConnection()), this, SLOT(onNewConnection()));
    connect(ui.actStart, SIGNAL(clicked()), this, SLOT(slot_actStart()));
    connect(ui.actStop, SIGNAL(clicked()), this, SLOT(slot_actStop()));
    connect(ui.btnSend, SIGNAL(clicked()), this, SLOT(slot_btnSend()));
}

QString tcp_test::getLocalIP()
{
    QString hostName = QHostInfo::localHostName();
    QHostInfo hostInfo = QHostInfo::fromName(hostName);
    QString localIP = "";
    QList<QHostAddress> addList = hostInfo.addresses();

    if (!addList.isEmpty())
    {
        for (int i = ; i < addList.count(); i++)
        {
            QHostAddress aHost = addList.at(i);
            if (QAbstractSocket::IPv4Protocol == aHost.protocol())
            {
                localIP = aHost.toString();
                break;
            }
        }
    }
    return localIP;
}

void tcp_test::slot_actStart()
{
    QString IP = ui.comboIP->currentText();
    quint16 port = ui.spinBox->value();
    QHostAddress addr(IP);
    tcpServer->listen(addr, port);
    ui.textBrowser->append(QString::fromLocal8Bit("**开始监听**"));
    ui.textBrowser->append(QString::fromLocal8Bit("**服务器地址:") + tcpServer->serverAddress().toString());
    ui.textBrowser->append(QString::fromLocal8Bit("**服务器端口:") + QString::number(tcpServer->serverPort()));
    ui.actStart->setEnabled(false);
    ui.actStop->setEnabled(true);
    LabListen->setText(QString::fromLocal8Bit("监听状态:正在监听"));
}

void tcp_test::onNewConnection()
{
    tcpSocket = tcpServer->nextPendingConnection();
    connect(tcpSocket,SIGNAL(connected()),this,SLOT(onClientConnected()));
    onClientConnected();
    connect(tcpSocket,SIGNAL(disconnected()),this,SLOT(onClientDisconnevted()));
    connect(tcpSocket,SIGNAL(stateChanged(QAbstractSocket::SocketState)),this,SLOT(onSocketStateChange(QAbstractSocket::SocketState)));
    onSocketStateChange(tcpSocket->state());
    connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(onSocketReadyRead()));

    ui.btnSend->setEnabled(true);
}

void tcp_test::onClientConnected()
{
    ui.textBrowser->append("**client socket connected");
    ui.textBrowser->append("**peer address:" + tcpSocket->peerAddress().toString());
    ui.textBrowser->append("**peer port:" + QString::number(tcpSocket->peerPort()));
}

void tcp_test::onClientDisconnevted()
{
    ui.textBrowser->append("**client socket disconnected");
    ui.btnSend->setEnabled(false);
    tcpSocket->deleteLater();
}

void tcp_test::onSocketStateChange(QAbstractSocket::SocketState socketState)
{
    switch (socketState)
    {
    case QAbstractSocket::UnconnectedState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:UnconnectedState"));        break;
    case QAbstractSocket::HostLookupState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:HostLookupState"));        break;
    case QAbstractSocket::ConnectingState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:ConnectingState"));        break;
    case QAbstractSocket::ConnectedState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:ConnectedState"));        break;
    case QAbstractSocket::BoundState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:BoundState"));        break;
    case QAbstractSocket::ClosingState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:ClosingState"));        break;
    case QAbstractSocket::ListeningState:
        LabSocketState->setText(QString::fromLocal8Bit("socket状态:ListeningState"));        break;
    }
}

void tcp_test::slot_actStop()
{
    if (tcpServer->isListening())
    {
        tcpServer->close();
        ui.actStart->setEnabled(true);
        ui.actStop->setEnabled(false);
        LabListen->setText(QString::fromLocal8Bit("监听状态:已停止监听"));
    }
}

void tcp_test::slot_btnSend()
{
    if (!tcpServer->isListening() )
    {
        return;
    }
    QString msg = ui.editMsg->text();
    QString msg2loacl8 = msg;
    QByteArray str = msg.toUtf8();
    ui.textBrowser->append("[out]  " + msg2loacl8);
    ui.editMsg->clear();
    ui.editMsg->setFocus();
    str.push_back('\n');

    tcpSocket->write(str);
}

void tcp_test::onSocketReadyRead()
{
    while (tcpSocket->canReadLine())
    {
        ui.textBrowser->append("[in]  " + tcpSocket->readLine());
    }
}

之前用创建的slot函数命名是这样的 :       on_btnStart_clicked()

没想到这样命名的话,不用connect连接了,点击相关控件就直接调用这个槽函数了.....

真没想到....

客户端的等等我再改一下

有错误和建议请加我的QQ:920209178