//客户端，#include "tcpcli.h"
#include "ui_tcpcli.h"TcpCli::TcpCli(QWidget *parent) :QWidget(parent),ui(new Ui::TcpCli)
{ui->setupUi(this);//给客户端指针实例化对象cli_sock = new QTcpSocket(this);ui->discntBtn->setEnabled(false);
//    ui->lineEdit->setEnabled(false);ui->pushButton->setEnabled(false);connect(cli_sock,&QTcpSocket :: connected,this,&TcpCli :: connected_slot);connect(cli_sock,&QTcpSocket :: readyRead,this,&TcpCli :: readyRd_slot);connect(cli_sock,&QTcpSocket :: disconnected,this,&TcpCli :: disconnected_slot);
}TcpCli::~TcpCli()
{delete ui;
}//重写键盘事件
void TcpCli::keyPressEvent(QKeyEvent *event)
{if(event->text() == "\r"){if(connectState != 1){QMessageBox :: critical(this,"错误","未连接服务器");return;}if(ui->lineEdit->text() == ""){QMessageBox :: warning(this,"警告","输入不能为空");return;}QString msg = usr_name + ":" + ui->lineEdit->text();cli_sock->write(msg.toLocal8Bit());ui->lineEdit->clear();}
}//连接服务器
void TcpCli::on_connectBtn_clicked()
{//获取ui界面的信息usr_name = ui->usrNameEdit->text();QString hostName = ui->ipEdit->text();quint16 port = ui->portEdit->text().toUInt();cli_sock->connectToHost(hostName,port);}void TcpCli::connected_slot()
{ui->ipEdit->setEnabled(false);ui->portEdit->setEnabled(false);ui->pushButton->setEnabled(true);ui->connectBtn->setEnabled(false);ui->usrNameEdit->setEnabled(false);ui->discntBtn->setEnabled(true);QMessageBox :: information(this,"信息","连接服务器成功");connectState = 1;//向服务器发送信息QString msg = usr_name + ":进入聊天室";cli_sock->write(msg.toLocal8Bit());}//关于readyRead信号对应槽函数的实现
void TcpCli::readyRd_slot()
{//读取该客户端中的数据QByteArray msg = cli_sock->readAll();ui->listWidget->addItem(QString :: fromLocal8Bit(msg));}//
void TcpCli::on_pushButton_clicked()
{QString msg = usr_name + ":"+ ui->lineEdit->text();cli_sock->write(msg.toLocal8Bit());//将消息编辑框中的内容清空ui->lineEdit->clear();}//断开连接按钮对应的槽函数
void TcpCli::on_discntBtn_clicked()
{//准备要发送的信息QString sndmsg = usr_name + ":离开聊天室";cli_sock->write(sndmsg.toLocal8Bit());cli_sock->disconnectFromHost();ui->ipEdit->setEnabled(true);ui->portEdit->setEnabled(true);ui->usrNameEdit->setEnabled(true);ui->connectBtn->setEnabled(true);ui->discntBtn->setEnabled(false);ui->pushButton->setEnabled(false);connectState = 0;}void TcpCli::disconnected_slot()
{QMessageBox :: information(this,"退出","断开成功");
}

//服务器,源文件
#include "tcpser.h"
#include "ui_tcpser.h"TcpSer::TcpSer(QWidget *parent) :QWidget(parent),ui(new Ui::TcpSer)
{ui->setupUi(this);//给服务器指针实例化对象server = new QTcpServer(this);speech = new QTextToSpeech(this);}TcpSer::~TcpSer()
{delete ui;
}//启动服务器按钮对应的槽函数
void TcpSer::on_pushButton_clicked()
{//获取ui界面上的端口号quint16 port = ui->lineEdit->text().toUInt();if(!server->listen(QHostAddress :: Any,port)){QMessageBox :: critical(this,"错误","服务器启动失败",QMessageBox :: Ok,QMessageBox :: Ok);return;}else{QMessageBox :: information(this,"信息","启动成功");connect(server,&QTcpServer :: newConnection,this,&TcpSer :: newCnt_slot);}}//自定义处理newConnection信号的槽函数实现
void TcpSer::newCnt_slot()
{speech->setVoice(QVoice());speech->say("咳咳咳");QTcpSocket *sock = server->nextPendingConnection();cli_list.push_back(sock);connect(sock,&QTcpSocket :: readyRead,this,&TcpSer :: rdyRead_slot);
}//
void TcpSer::rdyRead_slot()
{//删除客户端链表中的无效客户端套接字for(int i = 0;i < cli_list.size();i++){//判断套接字的状态if(0 == cli_list[i]->state()){cli_list.removeAt(i);}}for(int i = 0;i < cli_list.count();i++){if(cli_list[i]->bytesAvailable() != 0){QByteArray msg = cli_list[i]->readAll();//将数据展示到ui界面上ui->listWidget->addItem(QString :: fromLocal8Bit(msg));//将接收到的信息发送给所有客户端for(int j = 0;j < cli_list.count();j++){cli_list[j]->write(msg);}}}}

运行效果：服务器端，开启后