(求助)关于QWidget *是否调用 delete进行析构。

[weixin_38087180]

在成员函数中用到QWidget *w =new QWidget;在QListWidget中运用，setItemWidget(item,w);我把w进行析构出现段错误，做了判断，但是其值并不是NULL。问题：是是不是不用析构？下面是qt源码，里面有setParent.复制代码void QListWidget::setItemWidget(QListWidgetItem *item, QWidget *widget){    Q_D(QListWidget);    QModelIndex index = d->listModel()->index(item);    QAbstractItemView::setIndexWidget(index, widget);}复制代码void QAbstractItemView::setIndexWidget(const QModelIndex &index, QWidget *widget){    Q_D(QAbstractItemView);    if (!d->isIndexValid(index))        return;    if (QWidget *oldWidget = indexWidget(index)) {        d->persistent.remove(oldWidget);        d->removeEditor(oldWidget);        oldWidget->deleteLater();    }    if (widget) {        widget->setParent(viewport());        d->persistent.insert(widget);        d->addEditor(index, widget, true);        widget->show();        dataChanged(index, index); // update the geometry        if (!d->delayedPendingLayout)            widget->setGeometry(visualRect(index));    }}