Qt QWidget实现图片旋转动画

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

#include <QGraphicsSvgItem>
#include <QGraphicsScene>
#include <QTimer>
#include <QPropertyAnimation>

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private:
    Ui::MainWindow *ui;

    QGraphicsSvgItem  *graphItem;
    QGraphicsScene *graphScene;
};
#endif // MAINWINDOW_H

#include "mainwindow.h"
#include "ui_mainwindow.h"

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

    this->graphScene = new QGraphicsScene();

    this->ui->graphicsView->setScene(this->graphScene);


    this->graphItem = new QGraphicsSvgItem( ":/image/running.svg" );

    this->graphItem->setScale(0.5);

    QRectF boundingRect = this->graphItem->boundingRect();
    this->graphItem->setTransformOriginPoint(boundingRect.width() / 2, boundingRect.height() / 2);

    graphScene->addItem( this->graphItem );

    this->graphItem->setRotation(45);

    // 创建一个QPropertyAnimation对象来控制旋转属性
    QPropertyAnimation* rotationAnimation = new QPropertyAnimation(this->graphItem, "rotation");

    // 设置动画的起始值和结束值
    rotationAnimation->setStartValue(0);
    rotationAnimation->setEndValue(360);

    // 设置动画持续时间（以毫秒为单位）
    rotationAnimation->setDuration(3000);

    // 设置动画循环次数（-1表示无限循环）
    rotationAnimation->setLoopCount(-1);

    // 启动动画
    rotationAnimation->start();

    this->ui->graphicsView->installEventFilter(this);
    this->ui->graphicsView->centerOn(this->graphItem);
}

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