ModelSign *pModel = new ModelSign;
QWidget *pWdg = new QWidget;
pWdg->setProperty("obJectName", QVariant::fromValue((void *)pModel));
void *pModelSign = pWdg->property("obJectName").value();

ModelSign *pModel = new ModelSign;
QWidget *pWdg = new QWidget;
pWdg->setProperty("obJectName", QVariant::fromValue((void *)pModel));
void *pModelSign = pWdg->property("obJectName").value();