基于Qt简单聊天程序-具体步骤-详细注释

1、基于qt编写的cs模型的简单聊天程序开发Qt工具一.创建工程1,选择新建工程2 选择Qt4 Gui Application工程。(带UI界面编辑的工程)3 取工程名 C_S_Socket。路径随意,不要有任何中文 Next4 默认即可，Next（这是为此次工程选择要添加的头文件。我们不需要其他的功能。默认）5 Base class 选择QDialog。Class name 改 MainDlg。 Next（我们是基于Qt界面编程的嘛。所以就选QDialog Qt窗口类噻）6 Finish 完成(这里是编辑器告诉我们生成了如下文件)二.画界面1 点击maindlg.ui 进入主界面窗体设计成如下2

2、 设置各个控件的对象名(不能同名，系统用对象名找到控件。命名规范方便自己识别)  服务器单选框：radioButton_Server客户端单选框：radioButton_ClientIP地址框：lineEdit_Address用户名框：lineEdit_Name离开按钮：wayButton进入按钮：enterButton3 创建一个窗体类，用于发送接收信息的窗体选择窗体样式。修改类名 chat，下一步完成(chat:聊天的意思)4 第二窗体设计如下窗体控件对象名如下显示信息框：showMessageEdit输入信息框：writeMessageEdit用户名显示列表：onli

3、neMessageList关于按钮：aboutButton发送按钮：sendButton界面等操作到此结束！2013年12月8日16:47:31代码贴在后面。注意：代码写完后编译会出错！在C_S_S 工程文件的最后加上 QT += network 编译就不会出错了 (不知道什么意思，难道是为Qt加入网络的支持？)代码maindlg.h#ifndef MAINDLG_H#define MAINDLG_H#include <QDialog>namespace Ui class MainDlg;class MainDlg : public QDialog Q_OBJEC

4、Tpublic: MainDlg(QWidget *parent = 0); MainDlg(); bool m_bool_server;/判断选择的方式protected: void changeEvent(QEvent *e);signals:/信号 void showChatWindow(); void sendEnterMessage(QString, QString);private: Ui:MainDlg *ui;public slots:/槽 void enterSlot(); void OnSelectServer(); void OnSelectClient();#endif

5、 / MAINDLG_Hmaindlg.cpp#include "maindlg.h"#include "ui_maindlg.h"#include <QMessageBox>MainDlg:MainDlg(QWidget *parent) : QDialog(parent), ui(new Ui:MainDlg) ui->setupUi(this); /离开按钮点击事件的连接 connect(ui->awayButton, SIGNAL(clicked(),qApp, SLOT(quit(); /进入按钮点击事件的连接 conn

6、ect(ui->enterButton, SIGNAL(clicked(), this, SLOT(enterSlot(); /选择服务器单选按钮点击事件的连接 connect(ui->radioButton_Server, SIGNAL(clicked(), this, SLOT(OnSelectServer(); /选择客户端单选按钮点击事件的连接 connect(ui->radioButton_Client, SIGNAL(clicked(), this, SLOT(OnSelectClient();MainDlg:MainDlg() delete ui;/* *选择服

7、务器单选按钮的点击消息 */void MainDlg:OnSelectServer() m_bool_server = true; ui->lineEdit_Address->setText(""); if (ui->lineEdit_Name->text().isEmpty()| ui->lineEdit_Name->text()="Client") ui->lineEdit_Name->setText("Server");/* *选择客户端单选按钮的点击消息 */void MainD

8、lg:OnSelectClient() m_bool_server = false; ui->lineEdit_Address->setText(""); if (ui->lineEdit_Name->text().isEmpty() | ui->lineEdit_Name->text()="Server") ui->lineEdit_Name->setText("Client");void MainDlg:changeEvent(QEvent *e) QDialog:

9、changeEvent(e); switch (e->type() case QEvent:LanguageChange: ui->retranslateUi(this); break; default: break; void MainDlg:enterSlot() if (ui->lineEdit_Name->text().isEmpty() QMessageBox mess; mess.setFont(QFont("Sans Serif", 12, 50); mess.warning(this, QString:fromLocal8Bit(&q

10、uot;出错"), QString:fromLocal8Bit("<font size=5>请输入正确的昵称,谢谢!</font>"); return; /发射信号 emit sendEnterMessage(ui->lineEdit_Name->text(), ui->lineEdit_Address->text(); emit showChatWindow();chat.h#ifndef CHAT_H#define CHAT_H#include <QDialog>#include "main

11、dlg.h"#include <QDateTime>#include <QtNetwork/QTcpServer>/Tcp协议的服务器监听连接类#include <QtNetwork/QTcpSocket>/Tcp协议的Socket类#include <QtNetwork/QHostAddress>namespace Ui class chat;class chat : public QDialog Q_OBJECTpublic: chat(QWidget *parent = 0); chat(); void socketServer(

12、);/启动服务器监听连接 void socketClient(QString host);/与服务器连接 MainDlg *p_my_dlg;/主界面指针 int port;/端口号 QString m_str_userName;/用户名 bool m_bool_server;/是服务器还是客户端 /Tcp协议的服务器Socket类 QTcpServer *m_p_server;/Tcp协议的服务器监听连接类 QTcpSocket *m_p_serverSocket;/服务器Socket QTcpSocket *m_p_clientSocket;/客户端Socket QDateTime now

13、DateTime;/时间protected: void changeEvent(QEvent *e);private: Ui:chat *ui;public slots:/槽 void showAndHideSlot();/显示本窗体关闭主窗体 void changeButtonStateSlot();/如果输入框为空，则发送按钮不能使用 void createAboutSlot();/关于信息 void enterSlot(QString name, QString host);/选择服务器或客户端 void newConnectionSlot();/连接来时，服务器与客户端创建连接 voi

14、d newDataSlot();/有数据来时 void deleNameSlot();/ void addSlot(); void appendMessageSlot();#endif / CHAT_Hchat.cpp#include "chat.h"#include "ui_chat.h"#include <QMessageBox>chat:chat(QWidget *parent) : QDialog(parent), ui(new Ui:chat) ui->setupUi(this);/设置 UI设计的界面的控件 m_p_serv

15、er = NULL; m_p_serverSocket = NULL; m_p_clientSocket = NULL; p_my_dlg = new MainDlg;/主界面 p_my_dlg->show(); /显示主界面 /* *连接信号 */ /主窗体中显示本窗体信号 connect(p_my_dlg, SIGNAL(showChatWindow(), this, SLOT(showAndHideSlot(); connect(p_my_dlg, SIGNAL(sendEnterMessage(QString , QString), this,SLOT(enterSlot(QSt

16、ring , QString ); connect(ui->writeMessageEdit, SIGNAL(textChanged(), this, SLOT(changeButtonStateSlot(); connect(ui->aboutButton, SIGNAL(clicked(), this, SLOT(createAboutSlot(); connect(ui->sendButton, SIGNAL(clicked(), this, SLOT(appendMessageSlot();chat:chat() delete ui;/本窗体创建时由系统自动调用voi

17、d chat:changeEvent(QEvent *e) QDialog:changeEvent(e); switch (e->type() case QEvent:LanguageChange: ui->retranslateUi(this);/设置本船体的一些属性 break; default: break; /显示关闭主窗体，显示本窗体void chat:showAndHideSlot() delete p_my_dlg; this->show();/显示关于信息void chat:createAboutSlot() QMessageBox mess; mess.se

18、tFont(QFont("Sans Serif", 12, 50); mess.warning(this, QString:fromLocal8Bit("关于"), QString:fromLocal8Bit("<font size=5>基于qt编写的cs模型的简单聊天程序</font>");/根据选择p_my_dlg->m_bool_server 选择相应操作void chat:enterSlot(QString name, QString host) port = 22222;/设置Socket端口号

19、 m_bool_server = p_my_dlg->m_bool_server;/选择状态传送 if (m_bool_server) socketServer(); else socketClient(host); ui->sendButton->setDisabled(false);/发送按钮不能使用 m_str_userName = name; ui->onlineMessageList->addItem(name);/如果输入框为空，则发送按钮不能使用void chat:changeButtonStateSlot() bool boo_dis = ui-&

20、gt;writeMessageEdit->toPlainText().isEmpty(); ui->sendButton->setDisabled(boo_dis);/发送信息void chat:appendMessageSlot() /获取输入框内容，然后清空 QString content = ui->writeMessageEdit->toPlainText(); if (content.isEmpty() QMessageBox:warning(this, "出错", QString:fromLocal8Bit("发送的内容不

21、能为空"); return; nowDateTime = QDateTime:currentDateTime();/获取时间 /按指定格式拼合字符串 ui->showMessageEdit->append( QString("n%1 %2 %3n%4") .arg(nowDateTime.toString("yyyy-MM-dd hh:mm:ss") .arg(m_str_userName) .arg(QString:fromLocal8Bit("说道:") .arg(content) ); QDataStrea

22、m out;/流 if (m_bool_server) out.setDevice(m_p_serverSocket); else out.setDevice(m_p_clientSocket); int mark = 0;/普通信息代号 /发送代号+用户名=信息 out << mark; out << m_str_userName << content; ui->writeMessageEdit->clear();/创建服务器Socket 监听连接void chat:socketServer() m_p_server = new QTcpSer

23、ver(this);/创建TCP 服务器用于监听socket连接 m_p_serverSocket = new QTcpSocket(this);/创建套接字 m_p_server->listen(QHostAddress:Any, port);/监听 socket连接 /设置 有新连接信号，触发函数 connect(m_p_server, SIGNAL(newConnection(), this, SLOT(newConnectionSlot();/有新的连接时。槽void chat:newConnectionSlot() m_p_serverSocket = m_p_server-&

24、gt;nextPendingConnection(); /有数据来时， connect(m_p_serverSocket, SIGNAL(readyRead(), this, SLOT(newDataSlot(); connect(m_p_serverSocket, SIGNAL(disconnected(), this, SLOT(deleNameSlot();/创建客户端Socket 与服务器连接void chat:socketClient(QString host) m_p_clientSocket = new QTcpSocket(this); m_p_clientSocket->

25、;connectToHost(host, port); /当成功连接时，名字list框中加入用户名 connect(m_p_clientSocket, SIGNAL(connected(), this, SLOT(addSlot(); connect(m_p_clientSocket, SIGNAL(readyRead(), this, SLOT(newDataSlot(); connect(m_p_clientSocket, SIGNAL(disconnected(), this, SLOT(deleNameSlot();/在名字list框中加入用户名void chat:addSlot()

26、QString content; QDataStream out(m_p_clientSocket);/Qt socket 数据传输的方式 int mark = 11; /把socket看成流使用 out << mark;/发送代号11+用户名， 告诉服务器，连接成功了， out << m_str_userName << content;/接收信息void chat:newDataSlot() int mark; QString hisName; QString content; QDataStream in;/流对象 if (m_bool_server) in.setDevice(m_p_serverSocket);/把服务器的Sokcet当成流 else in.setDevice(m_p_clientSocket);/把客户端的Sokcet当成流 in >> mark;/读取代号 / 如果代号是11，则是客户端加入。添加用户名 if (mark = 11) /addList in >> hisName >> content; i