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) :

     QMainWindow(parent),

     ui(new Ui::MainWindow)

 {

     ui->setupUi(this);

     ui->sendButton->setEnabled(false);

     ui->disconnectButton->setEnabled(false);

     ui->IPLineEdit->setText("192.168.3.4");

     ui->portLineEdit->setText("");

     tcpSocket = NULL;//使用前先清空

 }

 MainWindow::~MainWindow()

 {

     delete tcpSocket;

     delete ui;

 }

 void MainWindow::sendMassage(){}

 void MainWindow::readMassage()

 {

     QByteArray data=tcpSocket->readAll();

     ui->clearLineEdit->setText(QString(data));

 }

 void MainWindow::displayError(QAbstractSocket::SocketError)

 {

     QMessageBox::warning (this, tr("Warnning"), tcpSocket->errorString ());

     tcpSocket->close ();

     ui->connnectButton->setEnabled (true);

     ui->disconnectButton->setEnabled (false);

     ui->sendButton->setEnabled (false);

 }

 void MainWindow::on_sendButton_clicked()

 {

     QString sendmessage;

     sendmessage = ui->sendLineEdit->text();

    /* if(sendmessage == NULL) return;

     QByteArray block;//暂时存储我们需要发送的数据

     QDataStream out(&block,QIODevice::WriteOnly);//TCP必须和数据流一起使用

     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）

     out << sendmessage;

     tcpSocket->write(block);*/

     QByteArray data;

     data.append(sendmessage);

     tcpSocket->write(data);

 }

 void MainWindow::on_clearButton_clicked()

 {

     ui->clearLineEdit->clear();

 }

 void MainWindow::on_connnectButton_clicked()

 {

     flag = false;

     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();

     tcpPort = ui->portLineEdit->text();

     if(tcpIp==NULL||tcpPort==NULL)//判断IP和PORT是否为空

     {

         QMessageBox msgBox;

         msgBox.setText("IP or PORT is Empty");

         msgBox.exec();

         return;

     }

     tcpSocket->connectToHost(tcpIp,tcpPort.toInt());//连接主机

     connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,

             SLOT(displayError(QAbstractSocket::SocketError)));//错误连接

     connect(tcpSocket,SIGNAL(connected()),this,

             SLOT(connectUpdata()));//更新连接之后按钮的使能

     connect(tcpSocket,SIGNAL(readyRead()),this,

             SLOT(readMassage()));//读取信息的连接

     ui->connnectButton->setEnabled (false);

     ui->disconnectButton->setEnabled (true);

 }

 void MainWindow::on_disconnectButton_clicked()

 {

     tcpSocket->abort();

     delete tcpSocket;

     tcpSocket=NULL;

     disconnectUpdata();

 }

 void MainWindow::connectUpdata()

 {

     if(!flag)

     {

         QMessageBox msgBox;

         msgBox.setText("TCP connect successful");

         msgBox.exec();

         ui->connnectButton->setEnabled(false);

         ui->sendButton->setEnabled(true);

         ui->disconnectButton->setEnabled(true);

         ui->IPLineEdit->setEnabled(false);

         ui->portLineEdit->setEnabled(false);

     }

     flag=true;

 }

 void MainWindow::disconnectUpdata()

 {

     ui->connnectButton->setEnabled(true);

     ui->sendButton->setEnabled(false);

     ui->disconnectButton->setEnabled(false);

     ui->IPLineEdit->setEnabled(true);

     ui->portLineEdit->setEnabled(true);

 }
 #ifndef MAINWINDOW_H

 #define MAINWINDOW_H

 #include <QMainWindow>

 #include <QTcpServer>

 #include <QTcpSocket>

 #include <QMessageBox>

 namespace Ui {

 class MainWindow;

 }

 class MainWindow : public QMainWindow

 {

     Q_OBJECT

 public:

     explicit MainWindow(QWidget *parent = );

     ~MainWindow();

 private slots:

    void sendMassage();

    void readMassage();

    void displayError(QAbstractSocket::SocketError);

    void connectUpdata();

    void disconnectUpdata();

    void on_sendButton_clicked();

    void on_clearButton_clicked();

    void on_connnectButton_clicked();

    void on_disconnectButton_clicked();

 private:

    //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;

    Ui::MainWindow *ui;

 };

 #endif // MAINWINDOW_H
 #-------------------------------------------------

 #

 # Project created by QtCreator --23T10::

 #

 #-------------------------------------------------

 QT       += core gui

 QT       += network

 greaterThan(QT_MAJOR_VERSION, ): QT += widgets

 TARGET = TCP_Server

 TEMPLATE = app

 # The following define makes your compiler emit warnings if you use

 # any feature of Qt which as been marked as deprecated (the exact warnings

 # depend on your compiler). Please consult the documentation of the

 # deprecated API in order to know how to port your code away from it.

 DEFINES += QT_DEPRECATED_WARNINGS

 # You can also make your code fail to compile if you use deprecated APIs.

 # In order to do so, uncomment the following line.

 # You can also select to disable deprecated APIs only up to a certain version of Qt.

 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.

 SOURCES += main.cpp\

         mainwindow.cpp

 HEADERS  += mainwindow.h

 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) :

     QMainWindow(parent),

     ui(new Ui::MainWindow)

 {

     ui->setupUi(this);

     ui->speedSlider->setMinimum();

     ui->speedSlider->setMaximum();

     ui->speedSlider->setPageStep();

     ui->speedSlider->setTickPosition(QSlider::TicksAbove);

     ui->timeSlider->setMinimum();

     ui->timeSlider->setMaximum();

     ui->timeSlider->setPageStep();

     ui->timeSlider->setTickPosition(QSlider::TicksAbove);

     ui->speedLineEdit->setText(tr(""));

     ui->timeLineEdit->setText(tr(""));

     ui->timeLineEdit->setEnabled(false);

     ui->speedLineEdit->setEnabled(false);

     ui->pushButton->setEnabled(false);

     ui->pushButton_2->setEnabled(false);

     ui->sendButton->setEnabled(false);

     ui->disconnectButton->setEnabled(false);

     ui->IPLineEdit->setText("192.168.3.4");

     ui->portLineEdit->setText("");

     tcpSocket = NULL;//使用前先清空

     my_class->g_data[] = ;

     my_class->g_data[] = ;

     for(int i=;i<;++i) my_class->g_data[i] = ;

     my_class->g_flag = ;

 }

 MainWindow::~MainWindow()

 {

     delete tcpSocket;

     delete my_class;

     delete ui;

 }

 void MainWindow::sendMassage(){}

 void MainWindow::readMassage()

 {

     QByteArray data=tcpSocket->readAll();

     QString p = data.toHex();

     ui->clearLineEdit->setText(p);

     //------把接受到的Qbyte转化成Qstring然后转化成int--------//

     //qDebug()<<p.toInt(0,16);

     qDebug()<<p;

     int temp;

     if(my_class->g_data[]>) temp = my_class->g_data[]-;

     else temp = my_class->g_data[];

     temp = temp* + my_class->g_roll;

     if(p.toInt(,) == temp)

     {

         ui->pushButton_2->setEnabled(false);

         ui->pushButton->setEnabled(true);

         ui->speedSlider->setEnabled(true);

         ui->timeSlider->setEnabled(true);

         my_class->g_flag = ;

     }

 }

 void MainWindow::displayError(QAbstractSocket::SocketError)

 {

     QMessageBox::warning (this, tr("Warnning"), tcpSocket->errorString ());

     tcpSocket->close ();

     ui->connnectButton->setEnabled (true);

     ui->disconnectButton->setEnabled (false);

     ui->sendButton->setEnabled (false);

 }

 void MainWindow::on_sendButton_clicked()

 {

     QString sendmessage;

     sendmessage = ui->sendLineEdit->text();

    /* if(sendmessage == NULL) return;

     QByteArray block;//暂时存储我们需要发送的数据

     QDataStream out(&block,QIODevice::WriteOnly);//TCP必须和数据流一起使用

     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）

     out << sendmessage;

     tcpSocket->write(block);*/

     QByteArray data;

     data.append(sendmessage);

     tcpSocket->write(QString2Hex(sendmessage));

 }

 //将字符型进制转化为16进制

 QByteArray MainWindow::QString2Hex(QString str)

     {

         QByteArray senddata;

         int hexdata,lowhexdata;

         int hexdatalen = ;

         int len = str.length();

         senddata.resize(len/);

         char lstr,hstr;

         for(int i=; i<len; )

         {

             hstr=str[i].toLatin1();   //字符型

             if(hstr == ' ')

             {

                 i++;

                 continue;

             }

             i++;

             if(i >= len)

                 break;

             lstr = str[i].toLatin1();

             hexdata = ConvertHexChar(hstr);

             lowhexdata = ConvertHexChar(lstr);

             if((hexdata == ) || (lowhexdata == ))

                 break;

             else

                 hexdata = hexdata*+lowhexdata;

             i++;

             senddata[hexdatalen] = (char)hexdata;

             hexdatalen++;

         }

         senddata.resize(hexdatalen);

         return senddata;

     }

  //将1-9 a-f字符转化为对应的整数

 int MainWindow::ConvertHexChar(char ch)

     {

         if((ch >= '') && (ch <= ''))

          return ch-'';

         else if((ch >= 'A') && (ch <= 'F'))

          return ch-'A'+;

         else if((ch >= 'a') && (ch <= 'f'))

          return ch-'a'+;

         else return (-);

     }

 void MainWindow::on_clearButton_clicked()

 {

     ui->clearLineEdit->clear();

 }

 void MainWindow::on_connnectButton_clicked()

 {

     flag = false;

     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();

     tcpPort = ui->portLineEdit->text();

     if(tcpIp==NULL||tcpPort==NULL)//判断IP和PORT是否为空

     {

         QMessageBox msgBox;

         msgBox.setText("IP or PORT is Empty");

         msgBox.exec();

         return;

     }

     tcpSocket->connectToHost(tcpIp,tcpPort.toInt());//连接主机

     connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,

             SLOT(displayError(QAbstractSocket::SocketError)));//错误连接

     connect(tcpSocket,SIGNAL(connected()),this,

             SLOT(connectUpdata()));//更新连接之后按钮的使能

     connect(tcpSocket,SIGNAL(readyRead()),this,

             SLOT(readMassage()));//读取信息的连接

     ui->connnectButton->setEnabled (false);

     ui->disconnectButton->setEnabled (true);

 }

 void MainWindow::on_disconnectButton_clicked()

 {

     ui->pushButton_2->setEnabled(false);

     ui->pushButton->setEnabled(true);

     ui->speedSlider->setEnabled(true);

     ui->timeSlider->setEnabled(true);

     my_class->g_flag = ;

     tcpSocket->abort();

     delete tcpSocket;

     tcpSocket=NULL;

     disconnectUpdata();

 }

 void MainWindow::connectUpdata()

 {

     if(!flag)

     {

         QMessageBox msgBox;

         msgBox.setText("TCP connect successful");

         msgBox.exec();

         ui->pushButton->setEnabled(true);//发送使能

         ui->connnectButton->setEnabled(false);

         ui->sendButton->setEnabled(true);

         ui->disconnectButton->setEnabled(true);

         ui->IPLineEdit->setEnabled(false);

         ui->portLineEdit->setEnabled(false);

     }

     flag=true;

 }

 void MainWindow::disconnectUpdata()

 {

     ui->connnectButton->setEnabled(true);

     ui->sendButton->setEnabled(false);

     ui->disconnectButton->setEnabled(false);

     ui->IPLineEdit->setEnabled(true);

     ui->portLineEdit->setEnabled(true);

     ui->pushButton->setEnabled(false);//发送使能

     ui->pushButton_2->setEnabled(false);

 }

 void MainWindow::on_speedSlider_valueChanged(int value)

 {

     value = value;

     int speedValue = ui->speedSlider->value();

     if(speedValue>&&speedValue<=)

     {

         ui->speedSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(speedValue>&&speedValue<=)

     {

         ui->speedSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(speedValue>&&speedValue<=)

     {

         ui->speedSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(speedValue>&&speedValue<=)

     {

         ui->speedSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(speedValue>)

     {

         ui->speedSlider->setValue();

         my_class->g_data[] = ;

     }

     speedValue = ui->speedSlider->value();

     QString str = QString("%1").arg(speedValue);//int型转化成QString显示

     ui->speedLineEdit->setText(str);

    // my_class->g_speed = speedValue;

 }

 void MainWindow::on_timeSlider_valueChanged(int value)

 {

     value = value;

     int timeValue = ui->timeSlider->value();

     if(timeValue>&&timeValue<=)

     {

         ui->timeSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(timeValue>&&timeValue<=)

     {

         ui->timeSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(timeValue>&&timeValue<=)

     {

         ui->timeSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(timeValue>&&timeValue<=)

     {

         ui->timeSlider->setValue();

         my_class->g_data[] = ;

     }

     else if(timeValue>)

     {

         ui->timeSlider->setValue();

         my_class->g_data[] = ;

     }

     timeValue = ui->timeSlider->value();

     QString str = QString("%1").arg(timeValue);//int型转化成QString显示

     ui->timeLineEdit->setText(str);

     //my_class->g_time = timeValue;

 }

 void MainWindow::on_pushButton_clicked()

 {

     ui->pushButton->setEnabled(false);//发送使能

     ui->pushButton_2->setEnabled(true);

     //板子编号取值

     bool flag =true;

     if(my_class->g_data[]>)

     {

         my_class->g_data[] =;

         my_class->g_data[]-=;

         flag = true;

     }

     else

     {

         flag = false;

         my_class->g_data[] = ;

     }//电机号和正反转取值

     my_class->g_data[] =my_class->g_data[]* + my_class->g_roll;

     //校验位取值

     int num;

     num = my_class->g_data[]+my_class->g_data[]+my_class->g_data[];

     my_class->g_data[] = num % ;

     //------------十进制转化成QString然后再转化成长十六进制发送------//

     qDebug()<<"number:";

     QString a1;

     for(int j=;j<;j++)

     {

         if(my_class->g_data[j]<)

         a1+=''+QString::number(my_class->g_data[j], ).toUpper();

         else a1+=QString::number(my_class->g_data[j], ).toUpper();

     }

     qDebug()<<a1;

     //QByteArray data;

     //data.append(a1);

     //tcpSocket->write(data);

     tcpSocket->write(QString2Hex(a1));

     my_class->g_data[] = (my_class->g_data[]-my_class->g_roll)/;

    if(flag) my_class->g_data[]+=;

     ui->speedSlider->setEnabled(false);

     ui->timeSlider->setEnabled(false);

     my_class->g_flag = ;

     switch (my_class->g_data[]) {

     case :if(my_class->g_roll==) ui->display1->setChecked(true);

            else ui->display1->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display2->setChecked(true);

            else ui->display2->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display3->setChecked(true);

            else ui->display3->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display4->setChecked(true);

            else ui->display4->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display5->setChecked(true);

            else ui->display5->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display6->setChecked(true);

            else ui->display6->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display7->setChecked(true);

            else ui->display7->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display8->setChecked(true);

            else ui->display8->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display9->setChecked(true);

            else ui->display9->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display10->setChecked(true);

            else ui->display10->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display11->setChecked(true);

            else ui->display11->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display12->setChecked(true);

            else ui->display12->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display13->setChecked(true);

            else ui->display13->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display14->setChecked(true);

            else ui->display14->setChecked(false);

         break;

     case :if(my_class->g_roll==) ui->display15->setChecked(true);

            else ui->display15->setChecked(false);

         break;

     default:

         break;

     }

 }

 void MainWindow::on_motor1_clicked()

 {

 if(my_class->g_flag==){

     //my_class->g_motor = 1;

     my_class->g_data[] =;

     ui->motor1->setStyleSheet("color: red");

     ui->motor2->setStyleSheet("color: black");//按键字颜色改变

     ui->motor3->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");

 }

 }

 void MainWindow::on_motor2_clicked()

 {

 if(my_class->g_flag==){

     //my_class->g_motor = 2;

     my_class->g_data[] =;

     ui->motor2->setStyleSheet("color: red");

     ui->motor1->setStyleSheet("color: black");

     ui->motor3->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");

 }

 }

 void MainWindow::on_motor3_clicked()

 {

     if(my_class->g_flag==){

     //my_class->g_motor = 3;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: red");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor4_clicked()

 {

     if(my_class->g_flag==){

     //my_class->g_motor = 4;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: red");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor5_clicked()

 {

     if(my_class->g_flag==){

     //my_class->g_motor = 5;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: red");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor6_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 6;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: red");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor7_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 7;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: red");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor8_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 8;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: red");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor9_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 9;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: red");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor10_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 10;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: red");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor11_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 11;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: red");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor12_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 12;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: red");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor13_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 13;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: red");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor14_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 14;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: red");

     ui->motor15->setStyleSheet("color: black");}

 }

 void MainWindow::on_motor15_clicked()

 {if(my_class->g_flag==){

     //my_class->g_motor = 15;

     my_class->g_data[] =;

     ui->motor3->setStyleSheet("color: black");

     ui->motor1->setStyleSheet("color: black");

     ui->motor2->setStyleSheet("color: black");

     ui->motor4->setStyleSheet("color: black");

     ui->motor5->setStyleSheet("color: black");

     ui->motor6->setStyleSheet("color: black");

     ui->motor7->setStyleSheet("color: black");

     ui->motor8->setStyleSheet("color: black");

     ui->motor9->setStyleSheet("color: black");

     ui->motor10->setStyleSheet("color: black");

     ui->motor11->setStyleSheet("color: black");

     ui->motor12->setStyleSheet("color: black");

     ui->motor13->setStyleSheet("color: black");

     ui->motor14->setStyleSheet("color: black");

     ui->motor15->setStyleSheet("color: red");}

 }

 void MainWindow::on_pushButton_3_clicked()

 {

     my_class->g_roll = ;//正转

     if(my_class->g_flag==){

     ui->pushButton_3->setStyleSheet("color: red");

     ui->pushButton_4->setStyleSheet("color: black");}

 }

 void MainWindow::on_pushButton_4_clicked()

 {

     my_class->g_roll = ;//反转

     if(my_class->g_flag==){

     ui->pushButton_3->setStyleSheet("color: black");

     ui->pushButton_4->setStyleSheet("color: red");}

 }

 void MainWindow::on_pushButton_2_clicked()

 {

     //板子编号取值

     bool flag = true;

     if(my_class->g_data[]>)

     {

         flag =true;

         my_class->g_data[] =;

         my_class->g_data[]-=;

     }

     else

     {

         flag = false;

         my_class->g_data[] = ;

     }//电机号和正反转取值

     my_class->g_data[] =my_class->g_data[]* + my_class->g_roll;

     //校验位取值

     int num1;

     num1 = my_class->g_data[]+my_class->g_data[]+my_class->g_data[];

     my_class->g_data[] = num1 % ;

     my_class->g_data[] = (my_class->g_data[]-my_class->g_roll)/;

     if(flag)    my_class->g_data[]+=;

     int temp3 = my_class->g_data[];

     int temp6 = my_class->g_data[];

     my_class->g_data[] =;

     //校验位取值

     int num;

     num = my_class->g_data[]+my_class->g_data[]+my_class->g_data[];

     my_class->g_data[] = num % ;

     //------------十进制转化成QString然后再转化成长十六进制发送------//

     qDebug()<<"number:";

     QString a1;

     for(int j=;j<;j++)

     {

         if(my_class->g_data[j]<)

         a1+=''+QString::number(my_class->g_data[j], ).toUpper();

         else a1+=QString::number(my_class->g_data[j], ).toUpper();

     }

     qDebug()<<a1;

     //QByteArray data;

     //data.append(a1);

     //tcpSocket->write(data);

     tcpSocket->write(QString2Hex(a1));

     ui->pushButton_2->setEnabled(false);

     ui->pushButton->setEnabled(true);

     ui->speedSlider->setEnabled(true);

     ui->timeSlider->setEnabled(true);

     my_class->g_data[] = temp3;

     my_class->g_data[] = temp6;

     my_class->g_flag = ;

 }

MainWindow.cpp

 #ifndef MAINWINDOW_H

 #define MAINWINDOW_H

 #include <QMainWindow>

 #include <QTcpServer>

 #include <QTcpSocket>

 #include <QMessageBox>

 #include <QCheckBox>

 #include "wjy_class.h"

 #include <QDebug>

 namespace Ui {

 class MainWindow;

 }

 class MainWindow : public QMainWindow

 {

     Q_OBJECT

     friend class wjy_class;

 public:

     wjy_class *my_class = new wjy_class;

     explicit MainWindow(QWidget *parent = );

     ~MainWindow();

 private slots:

    void sendMassage();

    void readMassage();

    void displayError(QAbstractSocket::SocketError);

    void connectUpdata();

    void disconnectUpdata();

    void on_sendButton_clicked();

    void on_clearButton_clicked();

    void on_connnectButton_clicked();

    void on_disconnectButton_clicked();

    void on_speedSlider_valueChanged(int value);

    void on_timeSlider_valueChanged(int value);

    QByteArray QString2Hex(QString str);

    int ConvertHexChar(char ch);

    void on_motor1_clicked();

    void on_motor2_clicked();

    void on_motor3_clicked();

    void on_pushButton_clicked();

    void on_motor4_clicked();

    void on_motor5_clicked();

    void on_motor6_clicked();

    void on_motor7_clicked();

    void on_motor8_clicked();

    void on_motor9_clicked();

    void on_motor10_clicked();

    void on_motor11_clicked();

    void on_motor12_clicked();

    void on_motor13_clicked();

    void on_motor14_clicked();

    void on_motor15_clicked();

    void on_pushButton_3_clicked();

    void on_pushButton_4_clicked();

    void on_pushButton_2_clicked();

 private:

    //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;

    Ui::MainWindow *ui;

 };

 #endif // MAINWINDOW_H

MainWindow.h

 #include "wjy_class.h"

 wjy_class::wjy_class():g_data{,,,,,,,,,},g_roll(),g_flag()

 {

 }

wjy_class.cpp

 #ifndef WJY_CLASS_H

 #define WJY_CLASS_H

 //#include <vector>

 using namespace std;

 class wjy_class

 {

 public:

     wjy_class();

     //vector<int> g_motor;//预留多路电机同时控制

     /*int g_motor;

     int g_speed;

     int g_time;*/

     int g_roll;

     long int g_data[];

     bool g_flag;

 };

 #endif // WJY_CLASS_H

wjy_class.h

 #include "mainwindow.h"

 #include <QApplication>

 #include "logindialog.h"

 #include "wjy_class.cpp"

 int main(int argc, char *argv[])

 {

     QApplication a(argc, argv);

     MainWindow w;

     LoginDialog login;

     if(login.exec() ==QDialog::Accepted)

     {

         w.show();

         return a.exec();

     }

     else return ;

 }

main.cpp

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！

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