QT实现TCP服务器客户端的搭建

服务器代码：

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);server = new QTcpServer(this);connect(server,&QTcpServer::newConnection,this,&Widget::newConnection_slot);
}Widget::~Widget()
{delete ui;
}//启动按钮的槽函数
void Widget::on_startBtn_clicked()
{quint16 port=ui->portEdit->text().toUInt();if(server->listen(QHostAddress::Any,port)){QMessageBox::information(this,"失败","监听失败");return ;}else{QMessageBox::information(this,"成功","服务器监听成功");return ;}
}
void Widget::newConnection_slot()
{qDebug()<<"您有新的客户端请求";QTcpSocket *s=server->nextPendingConnection();clientList.push_back(s);connect(s,&QTcpSocket::readyRead,this,& Widget::readyRead_slot);
}
void Widget::readyRead_slot()
{qDebug("有新消息发来了");for(int i=0;i<clientList.size();i++){if(clientList[i]->state()==0){clientList.removeAt(i);}}for(int i=0;i<clientList.size();i++){if(clientList[i]->bytesAvailable()!=0){QByteArray msg=clientList[i]->readAll();ui->msgWidget->addItem(QString::fromLocal8Bit(msg));for(int j=0;j<clientList.size();j++){clientList[j]->write(msg);}}}
}

客户端代码：

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);socket =new QTcpSocket(this);connect(socket,&QTcpSocket::connected,this,&Widget::connected_slot);connect(socket,&QTcpSocket::readyRead,this,&Widget::readyRead_slot);connect(socket,&QTcpSocket::disconnected,this,&Widget::disconnected_slot);
}Widget::~Widget()
{delete ui;
}//连接服务器按钮
void Widget::on_connectBtn_clicked()
{userName =ui->userNameEdit->text();QString ip=ui->ipEdit->text();quint16 port = ui->portEdit->text().toUInt();socket->connectToHost(ip,port);
}void Widget::connected_slot()
{QMessageBox::information(this,"成功","您已经成功进入聊天室");QString msg=userName + ":进入聊天室";socket->write(msg.toLocal8Bit());
}void Widget::readyRead_slot()
{QByteArray msg=socket->readAll();ui->msgWidget->addItem(QString::fromLocal8Bit(msg));
}void Widget::on_sendBtn_clicked()
{QString msg=userName+":"+ui->msgedit->text();socket->write(msg.toLocal8Bit());ui->msgedit->clear();
}void Widget::on_disconnectBtn_clicked()
{QString msg =userName+":我走了哈，我不打扰";socket->write(msg.toLocal8Bit());socket->disconnectFromHost();
}void Widget::disconnected_slot()
{QMessageBox::information(this,"提示","退出成功");
}