Qt5 程序启动画面动图效果

#ifndef MAINVIEW_H
#define MAINVIEW_H

#include <QWidget>
#include <QGridLayout>
#include <QPushButton>
#include <windows.h>
#include <QApplication>
#include <QTimer>

class MainView : public QWidget
{
    Q_OBJECT
public:
    explicit MainView(QWidget *parent = 0);
    QGridLayout *main;
    QPushButton *btn;

signals:
    void signals_WakeupApp();
    
private slots:
    void slots_StopStartup();
    void slots_WakeupApp();
    
private:
    bool startupIsOver;

};

#endif // MAINVIEW_H

#include "MainView.h"
#include <QDebug>

MainView::MainView(QWidget *parent) :
    QWidget(parent)
{
    startupIsOver = false;
    main = new QGridLayout(this);
    btn = new QPushButton(tr("Just Button"));
    main->addWidget(btn, 0, 0);
    connect(this, SIGNAL(signals_WakeupApp()), this, SLOT(slots_WakeupApp()));
    emit signals_WakeupApp();
    Sleep(3000);

}

void MainView::slots_StopStartup()
{
    startupIsOver = true;
}

void MainView::slots_WakeupApp()
{

    QTimer t;
    connect(&t ,SIGNAL(timeout()), this, SLOT(slots_StopStartup()));
    t.start(5000);
    while(!startupIsOver)
    {
        QApplication::processEvents();
    }
}

#include <QApplication>
#include <QPixmap>
#include <QSplashScreen>
#include <QLabel>
#include <QMovie>
#include "MainView.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QMovie *movie;

    movie=new QMovie(":/new/prefix1/4");
    QLabel *label=new QLabel("", 0);
    label->setWindowFlags(Qt::FramelessWindowHint);
    label->move(600,300);
    label->setMovie(movie);
    label->setScaledContents(true);
    movie->start();
    label->show();
    MainView w;
    w.show();
    label->close();
    return app.exec();
}