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作业要求:
1.思维导图
2.整理代码:TCP服务器
- #ifndef WIDGET_H
- #define WIDGET_H
-
- #include <QWidget>
- #include <QTcpServer>
- #include <QList>
- #include <QMessageBox>
- #include <QTcpSocket>
- #include <QByteArray>
- QT_BEGIN_NAMESPACE
- namespace Ui { class Widget; }
- QT_END_NAMESPACE
-
- class Widget : public QWidget
- {
- Q_OBJECT
-
- public:
- Widget(QWidget *parent = nullptr);
- ~Widget();
-
-
- private slots:
- void on_startBtn_clicked();
- void newConnection_slot();
- void readyRead_slot();
-
- private:
- Ui::Widget *ui;
- //套接字文件
- QTcpServer *server;
- QList<QTcpSocket *> socketlist;
-
- };
- #endif // WIDGET_H
- #include "widget.h"
- #include "ui_widget.h"
-
- Widget::Widget(QWidget *parent)
- : QWidget(parent)
- , ui(new Ui::Widget)
- ,server(new QTcpServer(this))
- {
- ui->setupUi(this);
- }
-
- Widget::~Widget()
- {
- delete ui;
- }
-
-
- void Widget::on_startBtn_clicked()
- {
- //1.创建好套接字后,首先绑定port
- quint16 port = ui->portEdit->text().toUInt();
- //2.开启监听
- if(server->listen(QHostAddress::Any,port)){
- //开启监听成功
- QMessageBox::information(this,"提示","开启监听成功",QMessageBox::Ok);
- }else{
- //开启监听失败
- QMessageBox::information(this,"提示","开启监听失败",QMessageBox::Ok);
- return;
- }
- //运行至此,开始连接newConnection()函数和槽
- connect(server,&QTcpServer::newConnection,this,&Widget::newConnection_slot);
-
- }
-
- void Widget::newConnection_slot()
- {
- //进入该函数,说明接受到客户端的连接
- //1.创建用于通信的套接字文件
- QTcpSocket *s = server->nextPendingConnection();
- //2.放入套接字容器
- socketlist.push_back(s);
- //发送信号readyread,将套接字与对应槽函数连接,从而可以实现通信。
- connect(s,&QTcpSocket::readyRead,this,&Widget::readyRead_slot);
- }
-
- void Widget::readyRead_slot()
- {
- //首先去除无效套接字文件。
- for(int i=0;i<socketlist.count();i++){
- if(socketlist.at(i)->state()==0){
- //说明无效,从列表中去除
- socketlist.removeAt(i);
- }
- }
- //接受信息
- for(int i=0;i<socketlist.count();i++){
- if(socketlist.at(i)->bytesAvailable()!=0){
- //说明接受到了信息
- QByteArray msg = socketlist.at(i)->readAll();
- ui->msgList->addItem(QString::fromLocal8Bit(msg));
- for(int j=0;j<socketlist.count();j++){
- socketlist.at(j)->write(msg);
- }
- }
- }
- }
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