QT可以實現一下簡單的動畫，比如 運動的時鐘 閃爍的按鈕。

動畫的實現：

（1）建立一個定時器

（2）呼叫QWidget::update()通知介面重繪

實現一個按鈕閃爍的例子：

circlewidget.h

#ifndef CIRCLAWIDGET_H
#define CIRCLAWIDGET_H
#include <QFrame>
#include<QTimer>
class CircleWidget:public QFrame
{
    Q_OBJECT
public:
    CircleWidget(QWidget *parent);
    
 
~CircleWidget();
private:
    void paintEvent(QPaintEvent *event);
    void timerEvent(QTimerEvent *event);
private:
    int m_timerId;
    int m_times;

};

#endif // CIRCLAWIDGET_H

 circlewidgit.cpp

# include"circlewidget.h"
#include<QPainter>
CircleWidget::CircleWidget(QWidget *parent):QFrame(parent)
{
    m_timerId
 
=startTimer(1000);
    m_times=0;
}
CircleWidget::~CircleWidget()
{

}
void CircleWidget::paintEvent(QPaintEvent *event)
{
        QPainter painter(this);
        int width=this->width();
        int height=this->height();
        painter.setPen(Qt::NoPen);
        if(m_times==0)
        {
         QBrush brush(QColor(
 
0xFF,0xFF,0xFF));
         painter.setBrush(brush);
         m_times=1;
        }
        else
        {
            QBrush brush(QColor(0x88,0x00,0xFF));
            painter.setBrush(brush);
           m_times=0;
        }
        m_times++;
        if(m_times==1)
        {
        m_times=0;
        }

         painter.drawEllipse(0,0,40,40);


}
void CircleWidget::timerEvent(QTimerEvent *event)
{

        update();

}