代码改错：错误提示：得到上一次亮度错误 #ifndef CONTROLFORM_H#define CONTROLFORM_H#include QWidgetnamespace Ui class ControlForm;class ControlForm public QWidget Q_OBJECTpublic explicit ControlFormQWidget parent

代码改错： 错误提示：得到上一次亮度错误: " " #ifndef CONTROLFORM_H #define CONTROLFORM_H

#include

namespace Ui { class ControlForm; }

class ControlForm : public QWidget { Q_OBJECT

public: explicit ControlForm(QWidget *parent = nullptr); ~ControlForm(); int getValue() const ;

private: Ui::ControlForm *ui;

public slots: void setValue(int value); signals: void valueChanged(int value); };

#endif // CONTROLFORM_H

#ifndef LIGHTS_H #define LIGHTS_H

#include

namespace Ui { class Lights; }

class Lights : public QWidget { Q_OBJECT

public: explicit Lights(int userid,QWidget *parent = nullptr); ~Lights(); void lightsWidget(); bool flag=false;

bool switchButton_status(bool checked);
void showEvent(QShowEvent *event);
void hideEvent(QHideEvent *event);

void loadLastStatus();
void saveLastStatus();

private: Ui::Lights *ui; int userid; void closeEvent(QCloseEvent *event); QString getLastBrightness(int userid); void updateLastBrightness(int userid, QString brightness);

};

#endif // LIGHTS_H

#include "controlform.h" #include "ui_controlform.h"

ControlForm::ControlForm(QWidget *parent) : QWidget(parent), ui(new Ui::ControlForm) { ui->setupUi(this);

connect(ui->horizontalSlider, &QSlider::valueChanged, ui->spinBox, &QSpinBox::setValue);

void (QSpinBox::*vci)(int) = &QSpinBox::valueChanged;
connect(ui->spinBox, vci, ui->horizontalSlider, &QSlider::setValue);

}

ControlForm::~ControlForm() { delete ui; }

int ControlForm::getValue()const { return ui->spinBox->value(); }

void ControlForm::setValue(int value) { ui->spinBox->setValue(value); }

#include "lights.h" #include "ui_lights.h" #include "switchform.h" #include "sqlite.h" #include #include #include #include #include #include

Lights::Lights(int userid,QWidget *parent) : QWidget(parent), ui(new Ui::Lights) { ui->setupUi(this); lightsWidget(); connect(ui->SwitchStatus,&SwitchForm::statusChanged,this,&Lights::switchButton_status);

connect(ui->Finished, &QPushButton::clicked, this,[=]{
    if(flag)
    {
        QString brighteness = QString::number(ui->ctrlform->getValue());
        qDebug()<<brighteness;
        updateSmartHomeStatus(userid,QString("智能灯"),QString("开启"),brighteness);
    }else
    {
        QMessageBox::information(this,"提示","智能灯未打开！");
        qDebug()<<"智能灯未打开！";
        updateSmartHomeStatus(userid,QString("智能灯"),QString("关闭"),QString("0"));
    }
});

loadLastStatus();

}

Lights::~Lights() { delete ui; }

void Lights::lightsWidget() { setWindowTitle("智能灯设置"); setAutoFillBackground(true); QPalette palette=this->palette(); QPixmap pixmap(":/user/image/image/light.jpg"); palette.setBrush(QPalette::Window, QBrush(pixmap)); setPalette(palette); setFixedSize(600,400); }

bool Lights::switchButton_status(bool checked) { qDebug()<<checked; flag=checked; return flag; }

void Lights::showEvent(QShowEvent *event) { loadLastStatus(); event->accept(); }

void Lights::hideEvent(QHideEvent *event) { saveLastStatus(); event->accept(); }

void Lights::closeEvent(QCloseEvent *event) { hide(); event->ignore(); }

void Lights::loadLastStatus() { QString brightness = getLastBrightness(userid); if (brightness.toInt() > 0) { ui->SwitchStatus->setChecked(true); ui->ctrlform->setValue(brightness.toInt()); } else { ui->SwitchStatus->setChecked(false); ui->ctrlform->setValue(0); } }

void Lights::saveLastStatus() { QString brightness = QString::number(ui->ctrlform->getValue()); updateLastBrightness(userid, brightness); }

QString Lights::getLastBrightness(int userid) { Sqlite::sqlite_init(); QString queryStr = QString("SELECT value FROM Status WHERE uid = %1 AND device_name = '智能灯'").arg(userid); QSqlQuery query; if (query.exec(queryStr) && query.next()) { return query.value(0).toString(); } else { qDebug() << "得到上一次亮度错误: " << query.lastError().text(); return ""; } }

void Lights::updateLastBrightness(int userid,QString brightness) { Sqlite::sqlite_init(); QString queryStr = QString("UPDATE Status SET value = '%1' WHERE uid = %2 AND device_name = '智能灯'").arg(brightness).arg(userid); QSqlQuery query; if (!query.exec(queryStr)) { qDebug() << "更新亮度失败: " << query.lastError().text(); } }

-- 创建用户表 CREATE TABLE IF NOT EXISTS users ( uid INTEGER PRIMARY KEY AUTOINCREMENT, username varchar(10), passwd varchar(10) ); INSERT INTO users (username, passwd) VALUES ('AA', '123456'); INSERT INTO users (username, passwd) VALUES ('B', '121212');

-- 创建智能家居状态表 CREATE TABLE IF NOT EXISTS Status ( sid INTEGER PRIMARY KEY AUTOINCREMENT, uid INTEGER , device_name varchar(10), device_state varchar(10), value varchar(10), mode varchar(10), FOREIGN KEY (uid) REFERENCES users (uid) ); INSERT INTO Status(uid, device_name, device_state, value, mode) VALUES (1, 'Curtains', 'On', '1.1', '睡眠模式');

UPDATE Status SET device_name = 'Aircondition' WHERE uid = 1