qt 聊天室

服务器端

widget.cpp

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    //实例化一个服务器对象
    server =new QTcpServer(this);

}

Widget::~Widget()
{
    delete ui;
}

//打开服务器按钮对应的槽函数
void Widget::on_tcpbtn_clicked()
{
    //获取ui界面上的端口号
    quint16 port = ui->pe->text().toUInt();
    //将服务器设置成监听状态
    //函数原型:bool listen()
    //将服务器设置为监听状态
    //参数1:要监听的主机地址,如果是any,则表明监听任意主机地址
    //参数2:接入的端口号,如果为0,表明,端口号由系统自动分配
    if(server->listen(QHostAddress::Any,port))
    {
        QMessageBox::information(this,"成功","打开服务器成功");
        //此时表明服务器已经打开,并处于监听状态
        //如果有客户端发来连接请求,那么该服务器就会自动触发一个newconnection信号
    }
    connect(server,&QTcpServer::newConnection,this,&Widget::newconnection_slot);
}

void Widget::newconnection_slot()
{
    //获取最新连接的客户端套接字
  QTcpSocket *s =server->nextPendingConnection();
  //将该套接字放入到套接字文件中
  clientVector.push_back(s);
  //此时一个服务器和多个客户端已经建立连接,如果有客户端向服务器发来数据
  //那么该客户端就会自动发射一个readyRead的信号
  //我们可以将该信号连接到自定的槽函数中,处理相关逻辑
  connect(s,&QTcpSocket::readyRead,this,&Widget::readyRead_slot);
}
//处理readyRead信号对应的槽函数
void Widget::readyRead_slot()
{
   //删除无效的客户端
    for(int i=0;istate()==0)
        {
            //删除
            clientVector.removeAt(i); //将当前客户端移除该容器
        }
    }
    //判断是哪一个客户端发来的数据
    for(int i=0;ibytesAvailable()!=0)
        {
           QByteArray msg= clientVector[i]->readAll();

           //将读取的数据 放到ui界面上
           ui->lw->addItem(QString::fromLocal8Bit(msg));
           //将获取的该套接字中的数据广播给所有客户端
           for(int j=0;jwrite(msg);
           }
        }
    }

客户端:

widget.cpp

#include "second.h"
#include "ui_second.h"

second::second(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::second)
{
    ui->setupUi(this);
    this->setWindowTitle("聊天室界面");//设置标题
    this->setWindowIcon(QIcon("C:\\Users\\86150\\Desktop\\icon\\1\\denglu_1.png"));//设置图标
    //创建logo

    socket=new QTcpSocket(this);
    //连接服务器
    connect(socket,&QTcpSocket::connected,this,&second::connected_slot);

    connect(socket,&QTcpSocket::readyRead,this,&second::readyRead_slot);

}
void second::jump_slot()
{
    this->show();
}
second::~second()
{
    delete ui;
}

void second::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);

    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.drawPixmap(rect(),QPixmap("C:\\Users\\86150\\Desktop\\icon\\background"));
}

void second::on_pushButton_clicked()
{
    bool ok;
    QFont f=QFontDialog::getFont(
                &ok,
                QFont("宋体",10,2,false),
                this);
    if(ok)
    {
        ui->textEdit->setCurrentFont(f);
    }else {
        QMessageBox::information(this,"错误","没有识别到你要的字体");
    }
}

void second::on_pushButton_2_clicked()
{
    QColor c=QColorDialog::getColor(
                Qt::black,
                this,
                "字体颜色"
                );
    if(c.isValid())
    {
        ui->textEdit->setTextColor(c);
    }else {
        QMessageBox::information(this,"错误","设置颜色失败");
    }
}

void second::on_pushButton_3_clicked()
{
   QString path=QFileDialog::getOpenFileName(
               this,
               "打开文件",
               "./",
               "所有文件(*.*);;文本文件(*.txt);;");
   QFile file(path);
   if(!file.exists())
   {
       QMessageBox::information(this,"错误信息","不存在");
       return;
   }
   if(!file.open(QIODevice::ReadWrite))
   {
       QMessageBox::information(this,"错误信息","读写错误");
       return;
   }
   QByteArray msg=file.readAll();
   file.close();
   ui->textEdit->setText(QString::fromLocal8Bit(msg));

}

void second::on_pushButton_4_clicked()
{
    QString path=QFileDialog::getSaveFileName(
                this,
                "保存文件",
                "./",
                "所有文件(*.*);;文本文件(*.txt);;");
    QFile file(path);
    if(!file.open(QIODevice::ReadWrite))
    {
        QMessageBox::information(this,"错误信息","不存在");
        return;
    }
    QString msg=ui->textEdit->toPlainText();
    file.write(msg.toLocal8Bit());
    file.close();
}

void second::on_pushButton_5_clicked()//发送按钮对应的槽函数
{
    QString msg =userName+" :"+ui->textEdit->toPlainText();
    socket->write(msg.toLocal8Bit());
    ui->textEdit->clear();
}

void second::on_connectbtn_clicked()
{
    QString ip =ui->ipedit->text();
    quint16 port=ui->portedit->text().toUInt();
    userName=ui->nameedit->text();
    if(ui->connectbtn->text()=="连接服务器")
    {
        socket->connectToHost(ip,port);
        ui->connectbtn->setText("断开服务器");
    }else{
        QString msg = userName + ":离开聊天室";
        socket->write(msg.toLocal8Bit());
        //完成断开服务器的逻辑
        socket->disconnectFromHost();
        ui->ipedit->setEnabled(true);
        ui->portedit->setEnabled(true);
        ui->nameedit->setEnabled(true);
        ui->connectbtn->setText("连接服务器");
    }
}

void second::connected_slot()
{
    QString msg=userName+":进入聊天室";
    socket->write(msg.toLocal8Bit());
    QMessageBox::information(this,"","连接成功");
    ui->ipedit->setEnabled(false);
    ui->portedit->setEnabled(false);
    ui->nameedit->setEnabled(false);
}

void second::readyRead_slot()
{
    if(socket->bytesAvailable()!=0)
    {
        QString msg=QString::fromLocal8Bit(socket->readAll());

        ui->listWidget->addItem(msg);
    }
}

qt 聊天室_第1张图片

 

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