Qt File Dialog doesn't remember the last directory after restarting project

Question

I'm loading some files for my project....but every time the fileDialog directory is my root directory...

I want the fileDialog to remember my path and I've tried the solution in the following link qsettings-file-chooser-should-remember-the-last-directory but this worked for me for the same session only.

Is there a way to save the directory for other sessions?(when closing the application and re-opening it)?

Answer 1

You can use the QSettings class.
This is simple example:
widget.h

#define WIDGET_H

#include <QWidget>
#include <QSettings>

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = 0);
    ~Widget();

private:
    QString lastDir;
    QSettings *settings;
    void settingsLoader();
    void settingsSaver();
};

#endif // WIDGET_H

widget.cpp

#include <QFileDialog>
#include "widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    settings = new QSettings("MyCompany", "My soft name", this);
    settingsLoader();
    lastDir = QFileDialog::getExistingDirectory(this, tr("Open directory"), lastDir);
}

void Widget::settingsLoader()
{
    lastDir = settings->value("LastDir", QDir::homePath()).toString();
}

void Widget::settingsSaver()
{
    settings->setValue("LastDir", lastDir);
}

Widget::~Widget()
{
    settingsSaver();
}