新建

SmartGreenhouse.pro

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+QT       += core gui network sql
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++11
+
+# The following define makes your compiler emit warnings if you use
+# any Qt feature that has been marked 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 it uses 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 6.0.0
+
+SOURCES += \
+    main.cpp \
+    mainmenu.cpp \
+    sql.cpp \
+    submenu.cpp
+
+HEADERS += \
+    mainmenu.h \
+    sql.h \
+    submenu.h
+
+FORMS += \
+    mainmenu.ui \
+    submenu.ui
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
+
+DISTFILES +=
+
+RESOURCES += \
+    img/img.qrc

img/img.qrc

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+<RCC>
+    <qresource prefix="/">
+        <file>hide.png</file>
+        <file>show.png</file>
+        <file>ico.png</file>
+        <file>R-C.jpg</file>
+        <file>OIP-C.jpg</file>
+        <file>OIP-C1.jpg</file>
+    </qresource>
+</RCC>

main.cpp

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+#include "mainmenu.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainMenu w;
+    w.show();
+    return a.exec();
+}

mainmenu.cpp

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+#include "mainmenu.h"
+#include "ui_mainmenu.h"
+
+MainMenu::MainMenu(QWidget *parent)
+    : QMainWindow(parent)
+    , ui(new Ui::MainMenu)
+{
+    ui->setupUi(this);
+
+    ui->lineEdit_2->setText("admin");
+    ui->lineEdit->setText("123456");
+    ui->lineEdit->setEchoMode(QLineEdit::Password);
+    this->setWindowIcon(QIcon(":/ico.png"));
+    this->setWindowTitle("快乐不起来啊");
+
+   this->setAutoFillBackground(true);
+         QPalette palette;
+         QPixmap pixmap(":/Resources/Penguins.jpg");
+         palette.setBrush(QPalette::Window, QBrush(pixmap));
+         this->setPalette(palette);
+}
+
+MainMenu::~MainMenu()
+{
+    delete ui;
+}
+
+
+void MainMenu::on_pushButton_clicked()
+{
+    tcpSocket = new QTcpSocket;
+    QString ip = ui->lineEdit_3->text();
+    tcpSocket->connectToHost(ip,7777);
+
+
+
+    connect(tcpSocket, SIGNAL(connected()), this, SLOT(show_connected()));
+    connect(tcpSocket, SIGNAL(disconnected()), this, SLOT(show_disconnected()));
+}
+
+void MainMenu::on_checkBox_stateChanged(int arg1)
+{
+    if(arg1)
+    {
+        ui->lineEdit->setEchoMode(QLineEdit::Normal);
+    }
+    else if (!arg1)
+    {
+        ui->lineEdit->setEchoMode(QLineEdit::Password);
+    }
+    else {
+        qDebug("err: ui->lineEdit->setEchoMode(QLineEdit::Password);");
+        return;
+    }
+    return ;
+}
+void MainMenu::show_connected()
+{
+    int ret = QMessageBox::information(this, tr("👨‍👩‍👦‍👦 登录成功"),tr("点击取消退出连接"),
+                                       QMessageBox::Ok,
+                                       QMessageBox::Cancel);
+    if(ret == QMessageBox::Cancel)
+    {
+        //        tcpSocket->disconnected();
+        delete tcpSocket;
+        return;
+    }
+    else {
+
+
+        //跳转到子界面
+        submenu *SubWindow = new submenu;
+        connect(SubWindow,SIGNAL(widget_close()),this,SLOT(subWindowClosed() ));
+        SubWindow->show();
+        this->hide();
+//        this->close();
+    }
+
+}
+void MainMenu::show_disconnected()
+{
+    int ret = QMessageBox::information(this, tr("👨‍👩‍👦‍👦 连接断开"),tr("是否重新连接？"),
+                                       QMessageBox::Yes,QMessageBox::No,QMessageBox::Cancel);
+    if(ret == QMessageBox::Cancel)
+    {
+        return;
+    }
+    if(ret == QMessageBox::No)
+    {
+        //        退出处理？
+        //        if(tcpSocket)
+        //        {
+        //            delete tcpSocket;
+        //        }
+        //        Sleep(20);
+        return;
+    }
+    else if(ret == QMessageBox::Yes)
+    {
+        ui->pushButton->click();
+    }
+    else{
+        qDebug("error:---");
+        return ;
+    }
+}
+void MainMenu::Sleep(int msec)
+{
+    QTime dieTime = QTime::currentTime().addMSecs(msec);
+    while( QTime::currentTime() < dieTime )
+        QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
+}
+void MainMenu::subWindowClosed()
+{
+    show();
+    tcpSocket->close();
+}

mainmenu.h

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+#ifndef MAINMENU_H
+#define MAINMENU_H
+
+#include <QString>
+#include <QMainWindow>
+#include <QFile>
+#include <QTcpSocket>       //
+#include <QHostAddress>     //地址格式
+#include <QMessageBox>
+#include <QTime>
+
+#include "submenu.h"
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class MainMenu; }
+QT_END_NAMESPACE
+
+class MainMenu : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainMenu(QWidget *parent = nullptr);
+    ~MainMenu();
+
+private slots:
+    void on_pushButton_clicked();
+    void on_checkBox_stateChanged(int arg1);
+    void show_connected();
+    void show_disconnected();
+    void Sleep(int msec);
+    void subWindowClosed();
+
+private:
+    QTcpSocket * tcpSocket;
+    Ui::MainMenu *ui;
+};
+#endif // MAINMENU_H

mainmenu.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainMenu</class>
+ <widget class="QMainWindow" name="MainMenu">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainMenu</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <widget class="QWidget" name="layoutWidget">
+    <property name="geometry">
+     <rect>
+      <x>255</x>
+      <y>217</y>
+      <width>183</width>
+      <height>109</height>
+     </rect>
+    </property>
+    <layout class="QVBoxLayout" name="verticalLayout_3">
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_2">
+       <item>
+        <layout class="QVBoxLayout" name="verticalLayout_2">
+         <item>
+          <widget class="QLabel" name="label">
+           <property name="text">
+            <string>账户：</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="label_2">
+           <property name="text">
+            <string>密码：</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="label_3">
+           <property name="text">
+            <string>IP：</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <layout class="QVBoxLayout" name="verticalLayout">
+         <item>
+          <widget class="QLineEdit" name="lineEdit_2"/>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="lineEdit"/>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="lineEdit_3">
+           <property name="text">
+            <string>172.16.3.135</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <item>
+        <widget class="QPushButton" name="pushButton">
+         <property name="text">
+          <string>登录</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QCheckBox" name="checkBox">
+         <property name="text">
+          <string>显示密码</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </widget>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>23</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

sql.cpp

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+#include "sql.h"
+
+sql::sql()
+{
+    //创建数据库
+    QSqlDatabase db =  QSqlDatabase::addDatabase("QSQLITE");    //添加驱动
+    db.setDatabaseName("SmartGreenhouse.db");                   //设置库名
+    bool ok =  db.open();
+    if(!ok){
+        qDebug("open failed");
+        return ;
+    }
+    else {
+        qDebug()<<"open success";
+    }
+
+    //通过db创建表
+    //db.exec("create table usr (name text, passwd text); ");
+
+
+    //通过query创建表
+    QSqlQuery query;
+    ok =  query.exec("create table if not exists user (id text, name text);");
+    if(!ok){
+        qDebug("failed to create user table");
+    }
+    else {
+        //        qDebug()<<"create table success";
+        qDebug()<<"Student table created successfully";
+    }
+    ok =  query.exec("create table if not exists Data (temp text, hum text,light text,co2 text);");
+    if(!ok){
+        qDebug("failed to create Data table");
+    }
+    else {
+        qDebug()<<"Data table created successfully";
+    }
+
+
+    //插入数据库
+
+        /*QString id = ui->lineEdit->text();
+        QString name = ui->lineEdit_2->text();
+
+
+        QString sql = QString("insert into stu values ('%1','%2')").arg(id).arg(name);
+
+        qDebug()<<"sql:"<<sql;
+
+        QSqlQuery query;
+        bool ok;
+        ok =  query.exec(sql);
+        if(!ok){
+            qDebug()<<"insert table failed";
+        }
+        else {
+            qDebug()<<"insert table success";
+        }*/
+
+
+    //删除一条记录  根据学号来删除
+  /*
+        QString id = ui->lineEdit->text();
+
+        QString sql = QString("delete from stu where id='%1'").arg(id);
+
+        qDebug()<<"sql:"<<sql;
+
+        QSqlQuery query;
+        bool ok;
+        ok =  query.exec(sql);
+        if(!ok){
+            qDebug()<<"delete table failed";
+        }
+        else {
+            qDebug()<<"delete table success";
+        }*/
+
+    //查询数据库
+
+     /*   QString sql = QString("select * from stu;");
+
+        qDebug()<<"sql:"<<sql;
+
+        QSqlQuery query;
+        bool ok;
+        ok =  query.exec(sql);
+        if(!ok){
+            qDebug()<<"select table failed";
+        }
+        else {
+            qDebug()<<"select table success";
+        }
+
+        while(query.next()){
+
+            qDebug()<< query.value("name").toString();
+        }*/
+}

sql.h

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+#ifndef SQL_H
+#define SQL_H
+
+#include <QObject>
+//#include <QSql>
+#include <QDebug>
+#include <QSqlQuery>
+#include <QSqlDatabase>
+class sql
+{
+public:
+    sql();
+};
+
+#endif // SQL_H

submenu.cpp

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+#include "submenu.h"
+#include "ui_submenu.h"
+
+submenu::submenu(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::submenu)
+{
+    ui->setupUi(this);
+    this->setWindowIcon(QIcon(":/ico.png"));
+    this->setWindowTitle("风中有朵雨做的云");
+}
+
+submenu::~submenu()
+{
+    delete ui;
+}
+
+void submenu::on_pushButton_clicked()
+{
+    this->hide();
+    emit widget_close();
+    this->close();
+}

submenu.h

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+#ifndef SUBMENU_H
+#define SUBMENU_H
+
+#include <QWidget>
+
+namespace Ui {
+class submenu;
+}
+
+class submenu : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit submenu(QWidget *parent = nullptr);
+    ~submenu();
+
+private slots:
+    void on_pushButton_clicked();
+
+private:
+    Ui::submenu *ui;
+signals:
+    void widget_close(void);
+
+};
+
+#endif // SUBMENU_H

submenu.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>submenu</class>
+ <widget class="QWidget" name="submenu">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <widget class="QPushButton" name="pushButton">
+   <property name="geometry">
+    <rect>
+     <x>160</x>
+     <y>240</y>
+     <width>75</width>
+     <height>23</height>
+    </rect>
+   </property>
+   <property name="text">
+    <string>退出</string>
+   </property>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>