Socket之TCP-IP

通常的TCP/IP流程如下：

Qt中的TCP/IP流程如下：

　　Qt中流程和普通的思路一样，只是封装成了自己的函数，使用更加方便

实现的效果如下

参考代码如下：

　　服务器.h文件：

 1 #ifndef WIDGET_H
 2 #define WIDGET_H
 3 
 4 #include <QWidget>
 5 #include <QTcpServer>
 6 #include <QTcpSocket>
 7 #include <QString>
 8 namespace Ui {
 9 class Widget;
10 }
11 
12 class Widget : public QWidget
13 {
14     Q_OBJECT
15 
16 public:
17     explicit Widget(QWidget *parent = 0);
18     ~Widget();
19 
20 private slots:
21     void on_send_clicked();
22     void communication();
23     void on_disconnect_clicked();
24     void showtext();
25 private:
26     Ui::Widget *ui;
27     QTcpServer *TcpServer;
28     QTcpSocket *TcpSocket;
29 };
30 
31 #endif // WIDGET_H

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　　服务器.cpp文件：

 1 #include "widget.h"
 2 #include "ui_widget.h"
 3 
 4 Widget::Widget(QWidget *parent) :
 5     QWidget(parent),
 6     ui(new Ui::Widget)
 7 {
 8     ui->setupUi(this);
 9     TcpServer = new QTcpServer(this);
10     TcpSocket = NULL;
11     setWindowTitle("服务器：6666");
12     TcpServer->listen(QHostAddress::Any,6666);
13      connect(TcpServer,&QTcpServer::newConnection,this,&Widget::communication);
14 
15 
16 }
17 void Widget::communication()
18 {
19     TcpSocket=TcpServer->nextPendingConnection();
20     QString ip = TcpSocket->peerAddress().toString();
21     ui->textEdit->setText(ip);
22     connect(TcpSocket,&QTcpSocket::readyRead,this,&Widget::showtext);
23 
24 }
25 void Widget::showtext()
26 {
27     QByteArray array = TcpSocket->readAll();
28     ui->textEdit->append(array);
29 }
30 Widget::~Widget()
31 {
32     delete ui;
33 }
34 
35 void Widget::on_send_clicked()
36 {
37     if(TcpSocket == NULL)
38        {
39         return;
40     }
41     QString text = ui->textEdit_2->toPlainText();
42     TcpSocket->write(text.toUtf8().data());
43 
44 }
45 
46 void Widget::on_disconnect_clicked()
47 {
48     if(TcpSocket == NULL)
49        {
50         return;
51     }
52     TcpSocket->disconnectFromHost();
53     TcpSocket->close();
54     TcpSocket = NULL;
55 
56 }

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　　客户端.h文件：

 1 #ifndef SOCKETWIDGET_H
 2 #define SOCKETWIDGET_H
 3 
 4 #include <QWidget>
 5 #include <QTcpSocket>
 6 #include <Qstring>
 7 #include <QHostAddress>
 8 namespace Ui {
 9 class SocketWidget;
10 }
11 
12 class SocketWidget : public QWidget
13 {
14     Q_OBJECT
15 
16 public:
17     explicit SocketWidget(QWidget *parent = 0);
18     ~SocketWidget();
19 public slots:
20     void dealdata();
21     void dealread();
22 private slots:
23     void on_send_clicked();
24 
25     void on_disconnect_clicked();
26 
27     void on_connect_clicked();
28 
29 private:
30     Ui::SocketWidget *ui;
31     QTcpSocket *TcpSocket;
32 };
33 
34 #endif // SOCKETWIDGET_H

View Code

　　客户端.cpp文件：

 1 #include "socketwidget.h"
 2 #include "ui_socketwidget.h"
 3 
 4 SocketWidget::SocketWidget(QWidget *parent) :
 5     QWidget(parent),
 6     ui(new Ui::SocketWidget)
 7 {
 8     ui->setupUi(this);
 9     TcpSocket = new QTcpSocket(this);
10     setWindowTitle("客户端");
11     connect(TcpSocket,&QTcpSocket::connected,this,&SocketWidget::dealdata);
12     connect(TcpSocket,&QTcpSocket::readyRead,this,&SocketWidget::dealread);
13 }
14 void SocketWidget::dealdata()
15 {
16     QString str= "已连接服务器";
17     ui->read->setText(str);
18 }
19 SocketWidget::~SocketWidget()
20 {
21     delete ui;
22 }
23 void SocketWidget::dealread()
24 {
25     QByteArray array = TcpSocket->readAll();
26     ui->read->append(array);
27 }
28 void SocketWidget::on_send_clicked()
29 {
30     QString sendtext = ui->write->toPlainText();
31     TcpSocket->write(sendtext.toUtf8().data());
32 //发送数据
33 }
34 
35 void SocketWidget::on_disconnect_clicked()
36 {
37     TcpSocket->disconnectFromHost();
38     TcpSocket->close();
39 }
40 
41 void SocketWidget::on_connect_clicked()
42 {
43     quint16  port = ui->port->toPlainText().toInt();
44     QString ip =  ui->ip->toPlainText();
45     TcpSocket->connectToHost(QHostAddress(ip),port);
46 //建立主动连接
47 }

View Code

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