Приложение Qt не работает должным образом

В общем, это должен был быть справочник, в который нужно записывать заметки в текстовое поле, а заметки привязаны к полю даты, также есть две кнопки: сохранить и удалить. Кнопка сохранить записывает текст даты в QSettings, но при следующем запуске программы ничего нет

main.cpp

#include "diary_by_painwizzard.h"

#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Diary_by_PainWizzard w;
w.show();
return a.exec();
}

C

#include "diary_by_painwizzard.h"



#include <QApplication>



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

{

    QApplication a(argc, argv);

    Diary_by_PainWizzard w;

    w.show();

    return a.exec();

}

diary_by_painwizzard.h

#ifndef DIARY_BY_PAINWIZZARD_H
#define DIARY_BY_PAINWIZZARD_H

#include <QMainWindow>
#include <QTextEdit>
#include <QPushButton>
#include <QDate>

QT_BEGIN_NAMESPACE
namespace Ui { class Diary_by_PainWizzard; }
QT_END_NAMESPACE

class Diary_by_PainWizzard : public QMainWindow
{
Q_OBJECT

public:
Diary_by_PainWizzard(QWidget *parent = nullptr);
~Diary_by_PainWizzard();
void saveSettings();
void loadSettings();
private slots:
void on_saveButton_pressed();
void on_deleteButton_pressed();
void on_date_changed(const QDate &date);
private:
Ui::Diary_by_PainWizzard *ui;
QMap<QDate, QString> map;

};
#endif // DIARY_BY_PAINWIZZARD_H

C

#ifndef DIARY_BY_PAINWIZZARD_H

#define DIARY_BY_PAINWIZZARD_H



#include <QMainWindow>

#include <QTextEdit>

#include <QPushButton>

#include <QDate>



QT_BEGIN_NAMESPACE

namespace Ui { class Diary_by_PainWizzard; }

QT_END_NAMESPACE



class Diary_by_PainWizzard : public QMainWindow

{

    Q_OBJECT



public:

    Diary_by_PainWizzard(QWidget *parent = nullptr);

    ~Diary_by_PainWizzard();

    void saveSettings();

    void loadSettings();

private slots:

    void on_saveButton_pressed();

    void on_deleteButton_pressed();

    void on_date_changed(const QDate &date);

private:

    Ui::Diary_by_PainWizzard *ui;

    QMap<QDate, QString> map;



};

#endif // DIARY_BY_PAINWIZZARD_H

diary_by_painwizzard.cpp

#include "diary_by_painwizzard.h"
#include "ui_diary_by_painwizzard.h"
#include <QTextStream>
#include <QInputDialog>
#include <QSettings>
#include <QApplication>


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

loadSettings();



connect(ui->save_button, SIGNAL(clicked()), this, SLOT(on_saveButton_pressed()));
connect(ui->delete_button, SIGNAL(clicked()), this, SLOT(on_deleteButton_pressed()));
connect(ui->dateEdit, SIGNAL(dateChanged(const QDate &)), this, SLOT(on_date_changed(const QDate &)));
}



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

void Diary_by_PainWizzard::saveSettings() {
QSettings settings("Reminds.ini", QSettings::Format::IniFormat);
settings.setValue("reminds", QVariant::fromValue(map));
settings.sync();
qDebug() << "Saved data:" << map;
}

void Diary_by_PainWizzard::loadSettings() {
QSettings settings("Reminds.ini", QSettings::Format::IniFormat);
map = settings.value("reminds").value<QMap<QDate, QString>>();
qDebug() << "Loaded data:" << map;
}


void Diary_by_PainWizzard::on_saveButton_pressed() {
QDate currentDate = ui->dateEdit->date();

QString currentText = ui->textEdit->toPlainText();

if(currentText.isEmpty()) return;

map[currentDate] = currentText;
saveSettings();
}

void Diary_by_PainWizzard::on_deleteButton_pressed() {
QDate currentDate = ui->dateEdit->date();
QString currentText = ui->textEdit->toPlainText();

currentText = "";
map[currentDate] = "";
ui->textEdit->setPlainText(currentText);
saveSettings();
}

void Diary_by_PainWizzard::on_date_changed(const QDate &date) {
QString savedText = map.value(date);
ui->textEdit->setPlainText(savedText);
}

C

#include "diary_by_painwizzard.h"

#include "ui_diary_by_painwizzard.h"

#include <QTextStream>

#include <QInputDialog>

#include <QSettings>

#include <QApplication>





Diary_by_PainWizzard::Diary_by_PainWizzard(QWidget *parent)

    : QMainWindow(parent)

    , ui(new Ui::Diary_by_PainWizzard)

{

    ui->setupUi(this);



    loadSettings();







    connect(ui->save_button, SIGNAL(clicked()), this, SLOT(on_saveButton_pressed()));

    connect(ui->delete_button, SIGNAL(clicked()), this, SLOT(on_deleteButton_pressed()));

    connect(ui->dateEdit, SIGNAL(dateChanged(const QDate &)), this, SLOT(on_date_changed(const QDate &)));

}







Diary_by_PainWizzard::~Diary_by_PainWizzard()

{

    delete ui;

}



void Diary_by_PainWizzard::saveSettings() {

    QSettings settings("Reminds.ini", QSettings::Format::IniFormat);

    settings.setValue("reminds", QVariant::fromValue(map));

    settings.sync();

    qDebug() << "Saved data:" << map;

}



void Diary_by_PainWizzard::loadSettings() {

    QSettings settings("Reminds.ini", QSettings::Format::IniFormat);

    map = settings.value("reminds").value<QMap<QDate, QString>>();

    qDebug() << "Loaded data:" << map;

}





void Diary_by_PainWizzard::on_saveButton_pressed() {

    QDate currentDate = ui->dateEdit->date();



    QString currentText = ui->textEdit->toPlainText();



    if(currentText.isEmpty()) return;



    map[currentDate] = currentText;

    saveSettings();

}



void Diary_by_PainWizzard::on_deleteButton_pressed() {

    QDate currentDate = ui->dateEdit->date();

    QString currentText = ui->textEdit->toPlainText();



    currentText = "";

    map[currentDate] = "";

    ui->textEdit->setPlainText(currentText);

    saveSettings();

}



void Diary_by_PainWizzard::on_date_changed(const QDate &date) {

    QString savedText = map.value(date);

    ui->textEdit->setPlainText(savedText);

}

Заранее спасибо за помощь!