圆曾经的小车梦，造一台智能小车(四)之QT上位机控制小车

QT       += core gui network

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
//包含对应的头文件
#include <QTcpSocket>
#include <QDebug>
#include <QString>
#include <QByteArray>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
private slots:
    /*网络处理相关*/
    void ReadData();
    void ReadError(QAbstractSocket::SocketError);
    /*对应的四个按钮的按下和释放的槽函数，由系统自动生成*/
    void on_go_released();
    void on_back_released();
    void on_go_pressed();
    void on_back_pressed();
    void on_turn_left_pressed();
    void on_turn_right_pressed();
    void on_turn_left_released();
    void on_turn_right_released();
private:
    Ui::MainWindow *ui;
    QTcpSocket  *client ;
};
#endif // MAINWINDOW_H

#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setWindowTitle(tr("智能小车控制%1%2").arg(tr("----2020年5月19日")).arg(tr("----开发者:杨源鑫")));
    client = new QTcpSocket(this);
    client->abort();
    //连接TCP客户端处理相关的信号与槽
    connect(client,SIGNAL(readyRead()),this,SLOT(ReadData()));
    connect(client,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(ReadError(QAbstractSocket::SocketError)));
    //连接服务器
    client->connectToHost("192.168.4.1",8080);
    if (client->waitForConnected(1000))
        ui->label->setText("已连接智能小车");
    else
        ui->label->setText("连接智能小车失败!");
}
void MainWindow::ReadData()
{
    QByteArray buffer = client->readAll();
    if(!buffer.isEmpty())
        ui->textBrowser->append(buffer);
}
void MainWindow::ReadError(QAbstractSocket::SocketError)
{
    client->disconnectFromHost();
}
void MainWindow::on_go_pressed()
{
    QString data = "GO";
    ui->textBrowser->setText("前进");
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_back_pressed()
{
    QString data = "BACK";
    ui->textBrowser->setText("后退");
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_turn_left_pressed()
{
    QString data = "LEFT";
    ui->textBrowser->setText("左转");
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_turn_right_pressed()
{
    QString data = "RIGHT";
    ui->textBrowser->setText("右转");
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_turn_left_released()
{
    QString data = "STOP";
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_turn_right_released()
{
    QString data = "STOP";
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_go_released()
{
    QString data = "STOP";
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
void MainWindow::on_back_released()
{
    QString data = "STOP";
    client->write(data.toLatin1()); //qt5去除了.toAscii()
}
MainWindow::~MainWindow()
{
    delete client ;
    delete ui;
}