Qt之QPropertyAnimation&QEasingCurve

QPushButton *btn = new QPushButton("Button", this);
    btn->setGeometry(10, 10, 100, 30);

    QPropertyAnimation *animation;
    animation = new QPropertyAnimation(btn, "geometry", this);

    animation->setDuration(3000);//从起始坐标到结束坐标的时长[单位ms]3s，默认250ms
    animation->setStartValue(QRect(10, 10, 100, 30));  //设置起始坐标
    animation->setEndValue(QRect(200, 150, 100, 30));  //结束坐标，当坐标值改变时，会发生valueChanged信号事件

    animation->start();