我的QT属性在动画时不会更新

Question

我想在QT中为一个简单整数设置动画。为此，我创建了一个int属性，并对其进行了动画处理。我将finished（）信号连接到一个插槽，以便在更新时看到我的新值。如果读取我的属性，它总是显示1，但如果我读取附加到属性的整数，则表示udpates。为什么我没有看到我的房产更新？

这是我的代码：

·H

class MaFenetre : public QWidget
{
    Q_OBJECT

public:
    MaFenetre();
    int getToBeAnimated();
    void setToBeAnimated(int);

private slots:
    void valueChanged(QVariant);


private:
    int _toBeAnimated;
    Q_PROPERTY(int toBeAnimated READ getToBeAnimated WRITE setToBeAnimated)

};

#endif // MAFENETRE_H

的.cpp

MaFenetre::MaFenetre() : QWidget()
{
    QPropertyAnimation *animation = new QPropertyAnimation(this, "toBeAnimated");
    animation->setDuration(10000);
    animation->setStartValue(0);
    animation->setEndValue(100);

    animation->start();
    connect(animation, SIGNAL(valueChanged(QVariant)), this, SLOT(valueChanged(QVariant)));

}

void MaFenetre::valueChanged(QVariant state){

    /////////////////////////////
    //////THIS DOESN'T WORK////// <-- WHY DOESN'T IT WORK ?
    /////////////////////////////
    int newValue = property("toBeAnimated").convert(QVariant::Int);

    /////////////////////////////
    //////THIS WORKS//////
    /////////////////////////////
    //int newValue = _toBeAnimated;

    //Shows the value of newValue
    qDebug(QString::number(newValue).toStdString().c_str());
}

int MaFenetre::getToBeAnimated(){
    return _toBeAnimated;
}

void MaFenetre::setToBeAnimated(int value){
    _toBeAnimated = value;
}