QLabel show images like a video - c++

Question

I try to let a QLabel show images like a video.
I want this display my images from f0000.png to f0039.png slowly so I can see progress.
For some reason my for loop starts with 50.
When I see the program run it only show one image or it change too fast I can't see the progress.
How to fix it let it show images like video.

Answer 1

you can use a Qtimer and set the speed as faster as you need
header:
#include <QMainWindow>
#include <QTimer>
namespace Ui
{
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow() override;
public slots:
void updateLabel();
private:
Ui::MainWindow *ui;
QTimer* _timer;
int index{0};
QString pixResource{};
};
and impl.
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
ui->setupUi(this);
_timer = new QTimer(parent);
connect(_timer, SIGNAL(timeout()), this, SLOT(updateLabel()));
_timer->start(1000);
}
MainWindow::~MainWindow()
{
delete ui;
_timer->stop();
delete _timer;
}
void MainWindow::updateLabel()
{
if (index >= 10)
{
index = 0;
}
qDebug() << "index: " << index;
pixResource = "res/foo/image/" + QString::number(index) + ".png";
qDebug() << "now the res: " << pixResource;
index++;
}