QT编写TCP入门+简单的实际项目（附源程序）

我个人感觉学习QT不需要那么深入的了解，因为我就是编写一下界面来实现理想的功能而已，我不是靠这个吃饭，当然以后要是从事这个方向那就好好深入底层好好学了。

学习QT的TCP：第一步：去百度看看TCP的介绍，大概了解一下。

                      第二步：先看看QT的关于TCP的帮助文档，QTcreator里面有的，也大概看一下。

                      第三步：直接下载一个源程序撸代码，先看懂程序然后对着对着源程序加上自己的理解，再重新码一遍就行了。

                      第四步：根据自己的需要修改界面。

非专业的人真心没必要去深入学习！！

TCP客户端界面：

#include "mainwindow.h"
#include "ui_mainwindow.h"

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
}  15 
MainWindow::~MainWindow()  17 {  18     delete tcpSocket;  19     delete ui;  20 }  21 
void MainWindow::sendMassage(){}  23 
void MainWindow::readMassage()  25 {  26     QByteArray data=tcpSocket->readAll();  27     ui->clearLineEdit->setText(QString(data));  28 }  29 
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 
void MainWindow::on_sendButton_clicked()  40 {  41  QString sendmessage;  42     sendmessage = ui->sendLineEdit->text();  43    /* if(sendmessage == NULL) return;  44  QByteArray block;//暂时存储我们需要发送的数据  45  QDataStream out(&block,QIODevice::WriteOnly);//TCP必须和数据流一起使用  46  out.setVersion(QDataStream::Qt_5_7);//设置数据流的版本（服务器和主机版本一定相同）  47  out << sendmessage;  48  tcpSocket->write(block);*/
 QByteArray data;  50  data.append(sendmessage);  51     tcpSocket->write(data);  52 }  53 
void MainWindow::on_clearButton_clicked()  55 {  56     ui->clearLineEdit->clear();  57 }  58 
void MainWindow::on_connnectButton_clicked()  60 {  61     flag = false;  62     if(tcpSocket) delete tcpSocket;//如果有指向其他空间直接删除
    tcpSocket = new QTcpSocket(this);//申请堆空间有TCP发送和接受操作
    tcpIp = ui->IPLineEdit->text();  65     tcpPort = ui->portLineEdit->text();  66     if(tcpIp==NULL||tcpPort==NULL)//判断IP和PORT是否为空
 {  68  QMessageBox msgBox;  69         msgBox.setText("IP or PORT is Empty");  70  msgBox.exec();  71         return;  72  }  73     tcpSocket->connectToHost(tcpIp,tcpPort.toInt());//连接主机
    connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,  75             SLOT(displayError(QAbstractSocket::SocketError)));//错误连接
    connect(tcpSocket,SIGNAL(connected()),this,  77             SLOT(connectUpdata()));//更新连接之后按钮的使能
    connect(tcpSocket,SIGNAL(readyRead()),this,  79             SLOT(readMassage()));//读取信息的连接
    ui->connnectButton->setEnabled (false);  81     ui->disconnectButton->setEnabled (true);  82 
}  84 
void MainWindow::on_disconnectButton_clicked()  86 {  87     tcpSocket->abort();  88     delete tcpSocket;  89     tcpSocket=NULL;  90  disconnectUpdata();  91 }  92 
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 
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 }

#ifndef MAINWINDOW_H  2 #define MAINWINDOW_H

#include <QMainWindow>
#include <QTcpServer>
#include <QTcpSocket>
#include <QMessageBox>
namespace Ui {  9 class MainWindow; 10 } 11 
class MainWindow : public QMainWindow 13 { 14  Q_OBJECT 15 
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 
private: 31    //QTcpServer *tcpServer;//不用再建立服务器类了，直接建立下面的套接字
   QTcpSocket *tcpSocket;//直接建立TCP套接字类
   QString tcpIp;//存储IP地址
   QString tcpPort;//存储端口地址
   bool flag; 36    Ui::MainWindow *ui; 37 
}; 39 
#endif // MAINWINDOW_H

#-------------------------------------------------
#  3 # Project created by QtCreator 2017-02-23T10:33:02
#  5 #-------------------------------------------------

QT       += core gui  8 QT       += network  9 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets 10 
TARGET = TCP_Server 12 TEMPLATE = app 13 
# 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 
# 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


SOURCES += main.cpp\ 27  mainwindow.cpp 28 
HEADERS  += mainwindow.h 30 
FORMS    += mainwindow.ui

 下载路径：QT_TCP客户端简单设计

 

基于TCP的简单应用程序：

                                   Qstring->16进制->TCP->WIFI->串口->CPU->电机

 

 

源程序奉上:

 

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :  5  QMainWindow(parent),  6     ui(new Ui::MainWindow)  7 {  8     ui->setupUi(this);  9 
    ui->speedSlider->setMinimum(0);  11     ui->speedSlider->setMaximum(200);  12     ui->speedSlider->setPageStep(50);  13     ui->speedSlider->setTickPosition(QSlider::TicksAbove);  14     ui->timeSlider->setMinimum(0);  15     ui->timeSlider->setMaximum(200);  16     ui->timeSlider->setPageStep(50);  17     ui->timeSlider->setTickPosition(QSlider::TicksAbove);  18     ui->speedLineEdit->setText(tr("0"));  19     ui->timeLineEdit->setText(tr("0"));  20     ui->timeLineEdit->setEnabled(false);  21     ui->speedLineEdit->setEnabled(false);  22     ui->pushButton->setEnabled(false);  23     ui->pushButton_2->setEnabled(false);  24 
    ui->sendButton->setEnabled(false);  26     ui->disconnectButton->setEnabled(false);  27     ui->IPLineEdit->setText("192.168.3.4");  28     ui->portLineEdit->setText("4001");  29     tcpSocket = NULL;//使用前先清空

    my_class->g_data[0] = 170;  32     my_class->g_data[1] = 85;  33     for(int i=2;i<7;++i) my_class->g_data[i] = 0;  34     my_class->g_flag = 1;  35 

}  38 
MainWindow::~MainWindow()  40 {  41     delete tcpSocket;  42     delete my_class;  43     delete ui;  44 
}  46 
void MainWindow::sendMassage(){}  48 
void MainWindow::readMassage()  50 {  51     QByteArray data=tcpSocket->readAll();  52     QString p = data.toHex();  53     ui->clearLineEdit->setText(p);  54     //------把接受到的Qbyte转化成Qstring然后转化成int--------//
    //qDebug()<<p.toInt(0,16);
    qDebug()<<p;  57     int temp;  58     if(my_class->g_data[3]>8) temp = my_class->g_data[3]-8;  59     else temp = my_class->g_data[3];  60     temp = temp*16 + my_class->g_roll;  61     if(p.toInt(0,16) == temp)  62  {  63         ui->pushButton_2->setEnabled(false);  64         ui->pushButton->setEnabled(true);  65         ui->speedSlider->setEnabled(true);  66         ui->timeSlider->setEnabled(true);  67         my_class->g_flag = 1;  68  }  69 }  70 
void MainWindow::displayError(QAbstractSocket::SocketError)  72 {  73     QMessageBox::warning (this, tr("Warnning"), tcpSocket->errorString ());  74     tcpSocket->close ();  75     ui->connnectButton->setEnabled (true);  76     ui->disconnectButton->setEnabled (false);  77     ui->sendButton->setEnabled (false);  78 }  79 
void MainWindow::on_sendButton_clicked()  81 {  82  QString sendmessage;  83     sendmessage = ui->sendLineEdit->text();  84    /* if(sendmessage == NULL) return;  85  QByteArray block;//暂时存储我们需要发送的数据  86  QDataStream out(&block,QIODevice::WriteOnly);//TCP必须和数据流一起使用  87  out.setVersion(QDataStream::Qt_5_7);//设置数据流的版本（服务器和主机版本一定相同）  88  out << sendmessage;  89  tcpSocket->write(block);*/

 QByteArray data;  92  data.append(sendmessage);  93     tcpSocket->write(QString2Hex(sendmessage));  94 }  95 
//将字符型进制转化为16进制
QByteArray MainWindow::QString2Hex(QString str)  98  {  99  QByteArray senddata; 100         int hexdata,lowhexdata; 101         int hexdatalen = 0; 102         int len = str.length(); 103         senddata.resize(len/2); 104         char lstr,hstr; 105         for(int i=0; i<len; ) 106  { 107             hstr=str[i].toLatin1();   //字符型
            if(hstr == ' ') 109  { 110                 i++; 111                 continue; 112  } 113             i++; 114             if(i >= len) 115                 break; 116             lstr = str[i].toLatin1(); 117             hexdata = ConvertHexChar(hstr); 118             lowhexdata = ConvertHexChar(lstr); 119             if((hexdata == 16) || (lowhexdata == 16)) 120                 break; 121             else
                hexdata = hexdata*16+lowhexdata; 123             i++; 124             senddata[hexdatalen] = (char)hexdata; 125             hexdatalen++; 126  } 127  senddata.resize(hexdatalen); 128         return senddata; 129  } 130  //将1-9 a-f字符转化为对应的整数
int MainWindow::ConvertHexChar(char ch) 132  { 133         if((ch >= '0') && (ch <= '9')) 134          return ch-'0'; 135         else if((ch >= 'A') && (ch <= 'F')) 136          return ch-'A'+10; 137         else if((ch >= 'a') && (ch <= 'f')) 138          return ch-'a'+10; 139         else return (-1); 140  } 141 
void MainWindow::on_clearButton_clicked() 143 { 144     ui->clearLineEdit->clear(); 145 } 146 
void MainWindow::on_connnectButton_clicked() 148 { 149     flag = false; 150     if(tcpSocket) delete tcpSocket;//如果有指向其他空间直接删除
    tcpSocket = new QTcpSocket(this);//申请堆空间有TCP发送和接受操作
    tcpIp = ui->IPLineEdit->text(); 153     tcpPort = ui->portLineEdit->text(); 154     if(tcpIp==NULL||tcpPort==NULL)//判断IP和PORT是否为空
 { 156  QMessageBox msgBox; 157         msgBox.setText("IP or PORT is Empty"); 158  msgBox.exec(); 159         return; 160  } 161     tcpSocket->connectToHost(tcpIp,tcpPort.toInt());//连接主机
    connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this, 163             SLOT(displayError(QAbstractSocket::SocketError)));//错误连接
    connect(tcpSocket,SIGNAL(connected()),this, 165             SLOT(connectUpdata()));//更新连接之后按钮的使能
    connect(tcpSocket,SIGNAL(readyRead()),this, 167             SLOT(readMassage()));//读取信息的连接
    ui->connnectButton->setEnabled (false); 169     ui->disconnectButton->setEnabled (true); 170 
} 172 
void MainWindow::on_disconnectButton_clicked() 174 { 175     ui->pushButton_2->setEnabled(false); 176     ui->pushButton->setEnabled(true); 177     ui->speedSlider->setEnabled(true); 178     ui->timeSlider->setEnabled(true); 179     my_class->g_flag = 1; 180 
    tcpSocket->abort(); 182     delete tcpSocket; 183     tcpSocket=NULL; 184  disconnectUpdata(); 185 } 186 
void MainWindow::connectUpdata() 188 { 189     if(!flag) 190  { 191  QMessageBox msgBox; 192         msgBox.setText("TCP connect successful"); 193  msgBox.exec(); 194 
        ui->pushButton->setEnabled(true);//发送使能

        ui->connnectButton->setEnabled(false); 198         ui->sendButton->setEnabled(true); 199         ui->disconnectButton->setEnabled(true); 200         ui->IPLineEdit->setEnabled(false); 201         ui->portLineEdit->setEnabled(false); 202  } 203     flag=true; 204 } 205 
void MainWindow::disconnectUpdata() 207 { 208     ui->connnectButton->setEnabled(true); 209     ui->sendButton->setEnabled(false); 210     ui->disconnectButton->setEnabled(false); 211     ui->IPLineEdit->setEnabled(true); 212     ui->portLineEdit->setEnabled(true); 213     ui->pushButton->setEnabled(false);//发送使能
    ui->pushButton_2->setEnabled(false); 215 } 216 
void MainWindow::on_speedSlider_valueChanged(int value) 218 { 219     value = value; 220     int speedValue = ui->speedSlider->value(); 221     if(speedValue>0&&speedValue<=25) 222  { 223         ui->speedSlider->setValue(0); 224         my_class->g_data[4] = 1; 225  } 226     else if(speedValue>25&&speedValue<=75) 227  { 228         ui->speedSlider->setValue(50); 229         my_class->g_data[4] = 3; 230  } 231     else if(speedValue>75&&speedValue<=125) 232  { 233         ui->speedSlider->setValue(100); 234         my_class->g_data[4] = 5; 235  } 236     else if(speedValue>125&&speedValue<=175) 237  { 238         ui->speedSlider->setValue(150); 239         my_class->g_data[4] = 7; 240  } 241     else if(speedValue>175) 242  { 243         ui->speedSlider->setValue(200); 244         my_class->g_data[4] = 9; 245  } 246     speedValue = ui->speedSlider->value(); 247     QString str = QString("%1").arg(speedValue);//int型转化成QString显示
    ui->speedLineEdit->setText(str); 249    // my_class->g_speed = speedValue;
} 251 
void MainWindow::on_timeSlider_valueChanged(int value) 253 { 254     value = value; 255     int timeValue = ui->timeSlider->value(); 256     if(timeValue>0&&timeValue<=25) 257  { 258         ui->timeSlider->setValue(0); 259         my_class->g_data[5] = 9; 260  } 261     else if(timeValue>25&&timeValue<=75) 262  { 263         ui->timeSlider->setValue(50); 264         my_class->g_data[5] = 7; 265  } 266     else if(timeValue>75&&timeValue<=125) 267  { 268         ui->timeSlider->setValue(100); 269         my_class->g_data[5] = 5; 270  } 271     else if(timeValue>125&&timeValue<=175) 272  { 273         ui->timeSlider->setValue(150); 274         my_class->g_data[5] = 3; 275  } 276     else if(timeValue>175) 277  { 278         ui->timeSlider->setValue(200); 279         my_class->g_data[5] = 1; 280  } 281     timeValue = ui->timeSlider->value(); 282     QString str = QString("%1").arg(timeValue);//int型转化成QString显示
    ui->timeLineEdit->setText(str); 284     //my_class->g_time = timeValue;
} 286 
void MainWindow::on_pushButton_clicked() 288 { 289 
    ui->pushButton->setEnabled(false);//发送使能
    ui->pushButton_2->setEnabled(true); 292     //板子编号取值
    bool flag =true; 294     if(my_class->g_data[3]>8) 295  { 296         my_class->g_data[2] =2; 297         my_class->g_data[3]-=8; 298         flag = true; 299  } 300     else
 { 302         flag = false; 303         my_class->g_data[2] = 1; 304     }//电机号和正反转取值
    my_class->g_data[3] =my_class->g_data[3]*16 + my_class->g_roll; 306     //校验位取值
    int num; 308     num = my_class->g_data[3]+my_class->g_data[4]+my_class->g_data[5]; 309     my_class->g_data[6] = num % 256; 310     //------------十进制转化成QString然后再转化成长十六进制发送------// 311     qDebug()<<"number:"; 312  QString a1; 313     for(int j=0;j<7;j++) 314  { 315         if(my_class->g_data[j]<16) 316         a1+='0'+QString::number(my_class->g_data[j], 16).toUpper(); 317         else a1+=QString::number(my_class->g_data[j], 16).toUpper(); 318  } 319     qDebug()<<a1; 320     //QByteArray data; 321     //data.append(a1); 322     //tcpSocket->write(data);
    tcpSocket->write(QString2Hex(a1)); 324     my_class->g_data[3] = (my_class->g_data[3]-my_class->g_roll)/16; 325    if(flag) my_class->g_data[3]+=8; 326 

    ui->speedSlider->setEnabled(false); 329     ui->timeSlider->setEnabled(false); 330     my_class->g_flag = 0; 331     switch (my_class->g_data[3]) { 332     case 1:if(my_class->g_roll==1) ui->display1->setChecked(true); 333            else ui->display1->setChecked(false); 334         break; 335     case 2:if(my_class->g_roll==1) ui->display2->setChecked(true); 336            else ui->display2->setChecked(false); 337         break; 338     case 3:if(my_class->g_roll==1) ui->display3->setChecked(true); 339            else ui->display3->setChecked(false); 340         break; 341     case 4:if(my_class->g_roll==1) ui->display4->setChecked(true); 342            else ui->display4->setChecked(false); 343         break; 344     case 5:if(my_class->g_roll==1) ui->display5->setChecked(true); 345            else ui->display5->setChecked(false); 346         break; 347     case 6:if(my_class->g_roll==1) ui->display6->setChecked(true); 348            else ui->display6->setChecked(false); 349         break; 350     case 7:if(my_class->g_roll==1) ui->display7->setChecked(true); 351            else ui->display7->setChecked(false); 352         break; 353     case 8:if(my_class->g_roll==1) ui->display8->setChecked(true); 354            else ui->display8->setChecked(false); 355         break; 356     case 9:if(my_class->g_roll==1) ui->display9->setChecked(true); 357            else ui->display9->setChecked(false); 358         break; 359     case 10:if(my_class->g_roll==1) ui->display10->setChecked(true); 360            else ui->display10->setChecked(false); 361         break; 362     case 11:if(my_class->g_roll==1) ui->display11->setChecked(true); 363            else ui->display11->setChecked(false); 364         break; 365     case 12:if(my_class->g_roll==1) ui->display12->setChecked(true); 366            else ui->display12->setChecked(false); 367         break; 368     case 13:if(my_class->g_roll==1) ui->display13->setChecked(true); 369            else ui->display13->setChecked(false); 370         break; 371     case 14:if(my_class->g_roll==1) ui->display14->setChecked(true); 372            else ui->display14->setChecked(false); 373         break; 374     case 15:if(my_class->g_roll==1) ui->display15->setChecked(true); 375            else ui->display15->setChecked(false); 376         break; 377     default: 378         break; 379  } 380 } 381 

void MainWindow::on_motor1_clicked() 384 { 385 if(my_class->g_flag==1){ 386     //my_class->g_motor = 1;
    my_class->g_data[3] =1; 388     ui->motor1->setStyleSheet("color: red"); 389     ui->motor2->setStyleSheet("color: black");//按键字颜色改变
    ui->motor3->setStyleSheet("color: black"); 391     ui->motor4->setStyleSheet("color: black"); 392     ui->motor5->setStyleSheet("color: black"); 393     ui->motor6->setStyleSheet("color: black"); 394     ui->motor7->setStyleSheet("color: black"); 395     ui->motor8->setStyleSheet("color: black"); 396     ui->motor9->setStyleSheet("color: black"); 397     ui->motor10->setStyleSheet("color: black"); 398     ui->motor11->setStyleSheet("color: black"); 399     ui->motor12->setStyleSheet("color: black"); 400     ui->motor13->setStyleSheet("color: black"); 401     ui->motor14->setStyleSheet("color: black"); 402     ui->motor15->setStyleSheet("color: black"); 403 } 404 } 405 
void MainWindow::on_motor2_clicked() 407 { 408 if(my_class->g_flag==1){ 409     //my_class->g_motor = 2;
    my_class->g_data[3] =2; 411     ui->motor2->setStyleSheet("color: red"); 412     ui->motor1->setStyleSheet("color: black"); 413     ui->motor3->setStyleSheet("color: black"); 414     ui->motor4->setStyleSheet("color: black"); 415     ui->motor5->setStyleSheet("color: black"); 416     ui->motor6->setStyleSheet("color: black"); 417     ui->motor7->setStyleSheet("color: black"); 418     ui->motor8->setStyleSheet("color: black"); 419     ui->motor9->setStyleSheet("color: black"); 420     ui->motor10->setStyleSheet("color: black"); 421     ui->motor11->setStyleSheet("color: black"); 422     ui->motor12->setStyleSheet("color: black"); 423     ui->motor13->setStyleSheet("color: black"); 424     ui->motor14->setStyleSheet("color: black"); 425     ui->motor15->setStyleSheet("color: black"); 426 } 427 } 428 
void MainWindow::on_motor3_clicked() 430 { 431     if(my_class->g_flag==1){ 432     //my_class->g_motor = 3;
    my_class->g_data[3] =3; 434     ui->motor3->setStyleSheet("color: red"); 435     ui->motor1->setStyleSheet("color: black"); 436     ui->motor2->setStyleSheet("color: black"); 437     ui->motor4->setStyleSheet("color: black"); 438     ui->motor5->setStyleSheet("color: black"); 439     ui->motor6->setStyleSheet("color: black"); 440     ui->motor7->setStyleSheet("color: black"); 441     ui->motor8->setStyleSheet("color: black"); 442     ui->motor9->setStyleSheet("color: black"); 443     ui->motor10->setStyleSheet("color: black"); 444     ui->motor11->setStyleSheet("color: black"); 445     ui->motor12->setStyleSheet("color: black"); 446     ui->motor13->setStyleSheet("color: black"); 447     ui->motor14->setStyleSheet("color: black"); 448     ui->motor15->setStyleSheet("color: black");} 449 } 450 
void MainWindow::on_motor4_clicked() 452 { 453     if(my_class->g_flag==1){ 454     //my_class->g_motor = 4;
    my_class->g_data[3] =4; 456     ui->motor3->setStyleSheet("color: black"); 457     ui->motor1->setStyleSheet("color: black"); 458     ui->motor2->setStyleSheet("color: black"); 459     ui->motor4->setStyleSheet("color: red"); 460     ui->motor5->setStyleSheet("color: black"); 461     ui->motor6->setStyleSheet("color: black"); 462     ui->motor7->setStyleSheet("color: black"); 463     ui->motor8->setStyleSheet("color: black"); 464     ui->motor9->setStyleSheet("color: black"); 465     ui->motor10->setStyleSheet("color: black"); 466     ui->motor11->setStyleSheet("color: black"); 467     ui->motor12->setStyleSheet("color: black"); 468     ui->motor13->setStyleSheet("color: black"); 469     ui->motor14->setStyleSheet("color: black"); 470     ui->motor15->setStyleSheet("color: black");} 471 } 472 
void MainWindow::on_motor5_clicked() 474 { 475     if(my_class->g_flag==1){ 476     //my_class->g_motor = 5;
    my_class->g_data[3] =5; 478     ui->motor3->setStyleSheet("color: black"); 479     ui->motor1->setStyleSheet("color: black"); 480     ui->motor2->setStyleSheet("color: black"); 481     ui->motor4->setStyleSheet("color: black"); 482     ui->motor5->setStyleSheet("color: red"); 483     ui->motor6->setStyleSheet("color: black"); 484     ui->motor7->setStyleSheet("color: black"); 485     ui->motor8->setStyleSheet("color: black"); 486     ui->motor9->setStyleSheet("color: black"); 487     ui->motor10->setStyleSheet("color: black"); 488     ui->motor11->setStyleSheet("color: black"); 489     ui->motor12->setStyleSheet("color: black"); 490     ui->motor13->setStyleSheet("color: black"); 491     ui->motor14->setStyleSheet("color: black"); 492     ui->motor15->setStyleSheet("color: black");} 493 } 494 
void MainWindow::on_motor6_clicked() 496 {if(my_class->g_flag==1){ 497     //my_class->g_motor = 6;
    my_class->g_data[3] =6; 499     ui->motor3->setStyleSheet("color: black"); 500     ui->motor1->setStyleSheet("color: black"); 501     ui->motor2->setStyleSheet("color: black"); 502     ui->motor4->setStyleSheet("color: black"); 503     ui->motor5->setStyleSheet("color: black"); 504     ui->motor6->setStyleSheet("color: red"); 505     ui->motor7->setStyleSheet("color: black"); 506     ui->motor8->setStyleSheet("color: black"); 507     ui->motor9->setStyleSheet("color: black"); 508     ui->motor10->setStyleSheet("color: black"); 509     ui->motor11->setStyleSheet("color: black"); 510     ui->motor12->setStyleSheet("color: black"); 511     ui->motor13->setStyleSheet("color: black"); 512     ui->motor14->setStyleSheet("color: black"); 513     ui->motor15->setStyleSheet("color: black");} 514 } 515 
void MainWindow::on_motor7_clicked() 517 {if(my_class->g_flag==1){ 518     //my_class->g_motor = 7;
    my_class->g_data[3] =7; 520     ui->motor3->setStyleSheet("color: black"); 521     ui->motor1->setStyleSheet("color: black"); 522     ui->motor2->setStyleSheet("color: black"); 523     ui->motor4->setStyleSheet("color: black"); 524     ui->motor5->setStyleSheet("color: black"); 525     ui->motor6->setStyleSheet("color: black"); 526     ui->motor7->setStyleSheet("color: red"); 527     ui->motor8->setStyleSheet("color: black"); 528     ui->motor9->setStyleSheet("color: black"); 529     ui->motor10->setStyleSheet("color: black"); 530     ui->motor11->setStyleSheet("color: black"); 531     ui->motor12->setStyleSheet("color: black"); 532     ui->motor13->setStyleSheet("color: black"); 533     ui->motor14->setStyleSheet("color: black"); 534     ui->motor15->setStyleSheet("color: black");} 535 } 536 
void MainWindow::on_motor8_clicked() 538 {if(my_class->g_flag==1){ 539     //my_class->g_motor = 8;
    my_class->g_data[3] =8; 541     ui->motor3->setStyleSheet("color: black"); 542     ui->motor1->setStyleSheet("color: black"); 543     ui->motor2->setStyleSheet("color: black"); 544     ui->motor4->setStyleSheet("color: black"); 545     ui->motor5->setStyleSheet("color: black"); 546     ui->motor6->setStyleSheet("color: black"); 547     ui->motor7->setStyleSheet("color: black"); 548     ui->motor8->setStyleSheet("color: red"); 549     ui->motor9->setStyleSheet("color: black"); 550     ui->motor10->setStyleSheet("color: black"); 551     ui->motor11->setStyleSheet("color: black"); 552     ui->motor12->setStyleSheet("color: black"); 553     ui->motor13->setStyleSheet("color: black"); 554     ui->motor14->setStyleSheet("color: black"); 555     ui->motor15->setStyleSheet("color: black");} 556 } 557 
void MainWindow::on_motor9_clicked() 559 {if(my_class->g_flag==1){ 560     //my_class->g_motor = 9;
    my_class->g_data[3] =9; 562     ui->motor3->setStyleSheet("color: black"); 563     ui->motor1->setStyleSheet("color: black"); 564     ui->motor2->setStyleSheet("color: black"); 565     ui->motor4->setStyleSheet("color: black"); 566     ui->motor5->setStyleSheet("color: black"); 567     ui->motor6->setStyleSheet("color: black"); 568     ui->motor7->setStyleSheet("color: black"); 569     ui->motor8->setStyleSheet("color: black"); 570     ui->motor9->setStyleSheet("color: red"); 571     ui->motor10->setStyleSheet("color: black"); 572     ui->motor11->setStyleSheet("color: black"); 573     ui->motor12->setStyleSheet("color: black"); 574     ui->motor13->setStyleSheet("color: black"); 575     ui->motor14->setStyleSheet("color: black"); 576     ui->motor15->setStyleSheet("color: black");} 577 } 578 
void MainWindow::on_motor10_clicked() 580 {if(my_class->g_flag==1){ 581     //my_class->g_motor = 10;
    my_class->g_data[3] =10; 583     ui->motor3->setStyleSheet("color: black"); 584     ui->motor1->setStyleSheet("color: black"); 585     ui->motor2->setStyleSheet("color: black"); 586     ui->motor4->setStyleSheet("color: black"); 587     ui->motor5->setStyleSheet("color: black"); 588     ui->motor6->setStyleSheet("color: black"); 589     ui->motor7->setStyleSheet("color: black"); 590     ui->motor8->setStyleSheet("color: black"); 591     ui->motor9->setStyleSheet("color: black"); 592     ui->motor10->setStyleSheet("color: red"); 593     ui->motor11->setStyleSheet("color: black"); 594     ui->motor12->setStyleSheet("color: black"); 595     ui->motor13->setStyleSheet("color: black"); 596     ui->motor14->setStyleSheet("color: black"); 597     ui->motor15->setStyleSheet("color: black");} 598 } 599 
void MainWindow::on_motor11_clicked() 601 {if(my_class->g_flag==1){ 602     //my_class->g_motor = 11;
    my_class->g_data[3] =11; 604     ui->motor3->setStyleSheet("color: black"); 605     ui->motor1->setStyleSheet("color: black"); 606     ui->motor2->setStyleSheet("color: black"); 607     ui->motor4->setStyleSheet("color: black"); 608     ui->motor5->setStyleSheet("color: black"); 609     ui->motor6->setStyleSheet("color: black"); 610     ui->motor7->setStyleSheet("color: black"); 611     ui->motor8->setStyleSheet("color: black"); 612     ui->motor9->setStyleSheet("color: black"); 613     ui->motor10->setStyleSheet("color: black"); 614     ui->motor11->setStyleSheet("color: red"); 615     ui->motor12->setStyleSheet("color: black"); 616     ui->motor13->setStyleSheet("color: black"); 617     ui->motor14->setStyleSheet("color: black"); 618     ui->motor15->setStyleSheet("color: black");} 619 } 620 
void MainWindow::on_motor12_clicked() 622 {if(my_class->g_flag==1){ 623     //my_class->g_motor = 12;
    my_class->g_data[3] =12; 625     ui->motor3->setStyleSheet("color: black"); 626     ui->motor1->setStyleSheet("color: black"); 627     ui->motor2->setStyleSheet("color: black"); 628     ui->motor4->setStyleSheet("color: black"); 629     ui->motor5->setStyleSheet("color: black"); 630     ui->motor6->setStyleSheet("color: black"); 631     ui->motor7->setStyleSheet("color: black"); 632     ui->motor8->setStyleSheet("color: black"); 633     ui->motor9->setStyleSheet("color: black"); 634     ui->motor10->setStyleSheet("color: black"); 635     ui->motor11->setStyleSheet("color: black"); 636     ui->motor12->setStyleSheet("color: red"); 637     ui->motor13->setStyleSheet("color: black"); 638     ui->motor14->setStyleSheet("color: black"); 639     ui->motor15->setStyleSheet("color: black");} 640 } 641 
void MainWindow::on_motor13_clicked() 643 {if(my_class->g_flag==1){ 644     //my_class->g_motor = 13;
    my_class->g_data[3] =13; 646     ui->motor3->setStyleSheet("color: black"); 647     ui->motor1->setStyleSheet("color: black"); 648     ui->motor2->setStyleSheet("color: black"); 649     ui->motor4->setStyleSheet("color: black"); 650     ui->motor5->setStyleSheet("color: black"); 651     ui->motor6->setStyleSheet("color: black"); 652     ui->motor7->setStyleSheet("color: black"); 653     ui->motor8->setStyleSheet("color: black"); 654     ui->motor9->setStyleSheet("color: black"); 655     ui->motor10->setStyleSheet("color: black"); 656     ui->motor11->setStyleSheet("color: black"); 657     ui->motor12->setStyleSheet("color: black"); 658     ui->motor13->setStyleSheet("color: red"); 659     ui->motor14->setStyleSheet("color: black"); 660     ui->motor15->setStyleSheet("color: black");} 661 } 662 
void MainWindow::on_motor14_clicked() 664 {if(my_class->g_flag==1){ 665     //my_class->g_motor = 14;
    my_class->g_data[3] =14; 667     ui->motor3->setStyleSheet("color: black"); 668     ui->motor1->setStyleSheet("color: black"); 669     ui->motor2->setStyleSheet("color: black"); 670     ui->motor4->setStyleSheet("color: black"); 671     ui->motor5->setStyleSheet("color: black"); 672     ui->motor6->setStyleSheet("color: black"); 673     ui->motor7->setStyleSheet("color: black"); 674     ui->motor8->setStyleSheet("color: black"); 675     ui->motor9->setStyleSheet("color: black"); 676     ui->motor10->setStyleSheet("color: black"); 677     ui->motor11->setStyleSheet("color: black"); 678     ui->motor12->setStyleSheet("color: black"); 679     ui->motor13->setStyleSheet("color: black"); 680     ui->motor14->setStyleSheet("color: red"); 681     ui->motor15->setStyleSheet("color: black");} 682 } 683 
void MainWindow::on_motor15_clicked() 685 {if(my_class->g_flag==1){ 686     //my_class->g_motor = 15;
    my_class->g_data[3] =15; 688     ui->motor3->setStyleSheet("color: black"); 689     ui->motor1->setStyleSheet("color: black"); 690     ui->motor2->setStyleSheet("color: black"); 691     ui->motor4->setStyleSheet("color: black"); 692     ui->motor5->setStyleSheet("color: black"); 693     ui->motor6->setStyleSheet("color: black"); 694     ui->motor7->setStyleSheet("color: black"); 695     ui->motor8->setStyleSheet("color: black"); 696     ui->motor9->setStyleSheet("color: black"); 697     ui->motor10->setStyleSheet("color: black"); 698     ui->motor11->setStyleSheet("color: black"); 699     ui->motor12->setStyleSheet("color: black"); 700     ui->motor13->setStyleSheet("color: black"); 701     ui->motor14->setStyleSheet("color: black"); 702     ui->motor15->setStyleSheet("color: red");} 703 } 704 
void MainWindow::on_pushButton_3_clicked() 706 { 707     my_class->g_roll = 1;//正转
    if(my_class->g_flag==1){ 709     ui->pushButton_3->setStyleSheet("color: red"); 710     ui->pushButton_4->setStyleSheet("color: black");} 711 } 712 
void MainWindow::on_pushButton_4_clicked() 714 { 715     my_class->g_roll = 2;//反转
    if(my_class->g_flag==1){ 717     ui->pushButton_3->setStyleSheet("color: black"); 718     ui->pushButton_4->setStyleSheet("color: red");} 719 } 720 
void MainWindow::on_pushButton_2_clicked() 722 { 723     //板子编号取值
    bool flag = true; 725     if(my_class->g_data[3]>8) 726  { 727         flag =true; 728         my_class->g_data[2] =2; 729         my_class->g_data[3]-=8; 730  } 731     else
 { 733         flag = false; 734         my_class->g_data[2] = 1; 735     }//电机号和正反转取值
    my_class->g_data[3] =my_class->g_data[3]*16 + my_class->g_roll; 737     //校验位取值
    int num1; 739     num1 = my_class->g_data[3]+my_class->g_data[4]+my_class->g_data[5]; 740     my_class->g_data[6] = num1 % 256; 741     my_class->g_data[3] = (my_class->g_data[3]-my_class->g_roll)/16; 742     if(flag)    my_class->g_data[3]+=8; 743     int temp3 = my_class->g_data[3]; 744     int temp6 = my_class->g_data[6]; 745 
    my_class->g_data[3] =255; 747     //校验位取值
    int num; 749     num = my_class->g_data[3]+my_class->g_data[4]+my_class->g_data[5]; 750     my_class->g_data[6] = num % 256; 751     //------------十进制转化成QString然后再转化成长十六进制发送------// 752     qDebug()<<"number:"; 753  QString a1; 754     for(int j=0;j<7;j++) 755  { 756         if(my_class->g_data[j]<16) 757         a1+='0'+QString::number(my_class->g_data[j], 16).toUpper(); 758         else a1+=QString::number(my_class->g_data[j], 16).toUpper(); 759  } 760     qDebug()<<a1; 761     //QByteArray data; 762     //data.append(a1); 763     //tcpSocket->write(data);
    tcpSocket->write(QString2Hex(a1)); 765 

    ui->pushButton_2->setEnabled(false); 768     ui->pushButton->setEnabled(true); 769     ui->speedSlider->setEnabled(true); 770     ui->timeSlider->setEnabled(true); 771 
    my_class->g_data[3] = temp3; 773     my_class->g_data[6] = temp6; 774     my_class->g_flag = 1; 775 }

#ifndef MAINWINDOW_H  2 #define MAINWINDOW_H

#include <QMainWindow>
#include <QTcpServer>
#include <QTcpSocket>
#include <QMessageBox>
#include <QCheckBox>
#include "wjy_class.h"
#include <QDebug>

namespace Ui { 13 class MainWindow; 14 } 15 
class MainWindow : public QMainWindow 17 { 18  Q_OBJECT 19     friend class wjy_class; 20 public: 21     wjy_class *my_class = new wjy_class; 22     explicit MainWindow(QWidget *parent = 0); 23     ~MainWindow(); 24 private slots: 25    void sendMassage(); 26    void readMassage(); 27    void displayError(QAbstractSocket::SocketError); 28    void connectUpdata(); 29    void disconnectUpdata(); 30    void on_sendButton_clicked(); 31    void on_clearButton_clicked(); 32    void on_connnectButton_clicked(); 33    void on_disconnectButton_clicked(); 34    void on_speedSlider_valueChanged(int value); 35    void on_timeSlider_valueChanged(int value); 36  QByteArray QString2Hex(QString str); 37    int ConvertHexChar(char ch); 38 
   void on_motor1_clicked(); 40    void on_motor2_clicked(); 41    void on_motor3_clicked(); 42    void on_pushButton_clicked(); 43 
   void on_motor4_clicked(); 45 
   void on_motor5_clicked(); 47 
   void on_motor6_clicked(); 49 
   void on_motor7_clicked(); 51 
   void on_motor8_clicked(); 53 
   void on_motor9_clicked(); 55 
   void on_motor10_clicked(); 57 
   void on_motor11_clicked(); 59 
   void on_motor12_clicked(); 61 
   void on_motor13_clicked(); 63 
   void on_motor14_clicked(); 65 
   void on_motor15_clicked(); 67 
   void on_pushButton_3_clicked(); 69 
   void on_pushButton_4_clicked(); 71 
   void on_pushButton_2_clicked(); 73 
private: 75    //QTcpServer *tcpServer;//不用再建立服务器类了，直接建立下面的套接字
   QTcpSocket *tcpSocket;//直接建立TCP套接字类
   QString tcpIp;//存储IP地址
   QString tcpPort;//存储端口地址
   bool flag; 80    Ui::MainWindow *ui; 81 
}; 83 

#endif // MAINWINDOW_H

#include "wjy_class.h"

wjy_class::wjy_class():g_data{0,0,0,0,0,0,0,0,0,0},g_roll(1),g_flag(1) 4 { 5 }

#ifndef WJY_CLASS_H  2 #define WJY_CLASS_H
//#include <vector>

using namespace std;  6 class wjy_class  7 {  8 public:  9  wjy_class(); 10     //vector<int> g_motor;//预留多路电机同时控制
    /*int g_motor; 12  int g_speed; 13  int g_time;*/
    int g_roll; 15     long int g_data[10]; 16     bool g_flag; 17 }; 18 
#endif // WJY_CLASS_H

#include "mainwindow.h"
#include <QApplication>
#include "logindialog.h"
#include "wjy_class.cpp"

int main(int argc, char *argv[])  7 {  8  QApplication a(argc, argv);  9  MainWindow w; 10  LoginDialog login; 11     if(login.exec() ==QDialog::Accepted) 12  { 13  w.show(); 14         return a.exec(); 15  } 16     else return 0; 17 
}

 源程序都在上面了，直接看懂复制就行了，如果有不对的地方，麻烦大家指正！