QT編寫簡單的TCP附源程序。本站提示廣大學習愛好者：（QT編寫簡單的TCP附源程序）文章只能為提供參考，不一定能成為您想要的結果。以下是QT編寫簡單的TCP附源程序正文
TCP客戶端界面：
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3
4 MainWindow::MainWindow(QWidget *parent) :
5 QMainWindow(parent),
6 ui(new Ui::MainWindow)
7 {
8 ui->setupUi(this);
9 ui->sendButton->setEnabled(false);
10 ui->disconnectButton->setEnabled(false);
11 ui->IPLineEdit->setText("192.168.3.4");
12 ui->portLineEdit->setText("4001");
13 tcpSocket = NULL;//使用前先清空
14 }
15
16 MainWindow::~MainWindow()
17 {
18 delete tcpSocket;
19 delete ui;
20 }
21
22 void MainWindow::sendMassage(){}
23
24 void MainWindow::readMassage()
25 {
26 QByteArray data=tcpSocket->readAll();
27 ui->clearLineEdit->setText(QString(data));
28 }
29
30 void MainWindow::displayError(QAbstractSocket::SocketError)
31 {
32 QMessageBox::warning (this, tr("Warnning"), tcpSocket->errorString ());
33 tcpSocket->close ();
34 ui->connnectButton->setEnabled (true);
35 ui->disconnectButton->setEnabled (false);
36 ui->sendButton->setEnabled (false);
37 }
38
39 void MainWindow::on_sendButton_clicked()
40 {
41 QString sendmessage;
42 sendmessage = ui->sendLineEdit->text();
43 /* if(sendmessage == NULL) return;
44 QByteArray block;//暫時存儲我們需要發送的數據
45 QDataStream out(&block,QIODevice::WriteOnly);//TCP必須和數據流一起使用
46 out.setVersion(QDataStream::Qt_5_7);//設置數據流的版本（服務器和主機版本一定相同）
47 out << sendmessage;
48 tcpSocket->write(block);*/
49 QByteArray data;
50 data.append(sendmessage);
51 tcpSocket->write(data);
52 }
53
54 void MainWindow::on_clearButton_clicked()
55 {
56 ui->clearLineEdit->clear();
57 }
58
59 void MainWindow::on_connnectButton_clicked()
60 {
61 flag = false;
62 if(tcpSocket) delete tcpSocket;//如果有指向其他空間直接刪除
63 tcpSocket = new QTcpSocket(this);//申請堆空間有TCP發送和接受操作
64 tcpIp = ui->IPLineEdit->text();
65 tcpPort = ui->portLineEdit->text();
66 if(tcpIp==NULL||tcpPort==NULL)//判斷IP和PORT是否為空
67 {
68 QMessageBox msgBox;
69 msgBox.setText("IP or PORT is Empty");
70 msgBox.exec();
71 return;
72 }
73 tcpSocket->connectToHost(tcpIp,tcpPort.toInt());//連接主機
74 connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,
75 SLOT(displayError(QAbstractSocket::SocketError)));//錯誤連接
76 connect(tcpSocket,SIGNAL(connected()),this,
77 SLOT(connectUpdata()));//更新連接之後按鈕的使能
78 connect(tcpSocket,SIGNAL(readyRead()),this,
79 SLOT(readMassage()));//讀取信息的連接
80 ui->connnectButton->setEnabled (false);
81 ui->disconnectButton->setEnabled (true);
82
83 }
84
85 void MainWindow::on_disconnectButton_clicked()
86 {
87 tcpSocket->abort();
88 delete tcpSocket;
89 tcpSocket=NULL;
90 disconnectUpdata();
91 }
92
93 void MainWindow::connectUpdata()
94 {
95 if(!flag)
96 {
97 QMessageBox msgBox;
98 msgBox.setText("TCP connect successful");
99 msgBox.exec();
100 ui->connnectButton->setEnabled(false);
101 ui->sendButton->setEnabled(true);
102 ui->disconnectButton->setEnabled(true);
103 ui->IPLineEdit->setEnabled(false);
104 ui->portLineEdit->setEnabled(false);
105 }
106 flag=true;
107 }
108
109 void MainWindow::disconnectUpdata()
110 {
111 ui->connnectButton->setEnabled(true);
112 ui->sendButton->setEnabled(false);
113 ui->disconnectButton->setEnabled(false);
114 ui->IPLineEdit->setEnabled(true);
115 ui->portLineEdit->setEnabled(true);
116 }
1 #ifndef MAINWINDOW_H
2 #define MAINWINDOW_H
3
4 #include <QMainWindow>
5 #include <QTcpServer>
6 #include <QTcpSocket>
7 #include <QMessageBox>
8 namespace Ui {
9 class MainWindow;
10 }
11
12 class MainWindow : public QMainWindow
13 {
14 Q_OBJECT
15
16 public:
17 explicit MainWindow(QWidget *parent = 0);
18 ~MainWindow();
19 private slots:
20 void sendMassage();
21 void readMassage();
22 void displayError(QAbstractSocket::SocketError);
23 void connectUpdata();
24 void disconnectUpdata();
25 void on_sendButton_clicked();
26 void on_clearButton_clicked();
27 void on_connnectButton_clicked();
28 void on_disconnectButton_clicked();
29
30 private:
31 //QTcpServer *tcpServer;//不用再建立服務器類了，直接建立下面的套接字
32 QTcpSocket *tcpSocket;//直接建立TCP套接字類
33 QString tcpIp;//存儲IP地址
34 QString tcpPort;//存儲端口地址
35 bool flag;
36 Ui::MainWindow *ui;
37
38 };
39
40 #endif // MAINWINDOW_H
1 #------------------------------------------------- 2 # 3 # Project created by QtCreator 2017-02-23T10:33:02 4 # 5 #------------------------------------------------- 6 7 QT += core gui 8 QT += network 9 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets 10 11 TARGET = TCP_Server 12 TEMPLATE = app 13 14 # The following define makes your compiler emit warnings if you use 15 # any feature of Qt which as been marked as deprecated (the exact warnings 16 # depend on your compiler). Please consult the documentation of the 17 # deprecated API in order to know how to port your code away from it. 18 DEFINES += QT_DEPRECATED_WARNINGS 19 20 # You can also make your code fail to compile if you use deprecated APIs. 21 # In order to do so, uncomment the following line. 22 # You can also select to disable deprecated APIs only up to a certain version of Qt. 23 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 24 25 26 SOURCES += main.cpp\ 27 mainwindow.cpp 28 29 HEADERS += mainwindow.h 30 31 FORMS += mainwindow.ui
