从 QTreeWidget 中删除行（qt 编程）
从 QTreeWidget 中删除行（QTreeWidgetItem）的最佳方法是什么？
QTreeWidget 内容已通过以下方式设置：
myQTreeWidget->insertTopLevelItems(0, items); // items = QList<QTreeWidgetItem*>
然后我从 QList“项目”中删除一个项目，并尝试清除/重置 QTreeWidget
packList->clear();
packList->insertTopLevelItems(0, items);
但我的应用程序在这里崩溃了！ 建议？
what's the best way to remove a row (QTreeWidgetItem) from a QTreeWidget?
The QTreeWidget content has been set by:
myQTreeWidget->insertTopLevelItems(0, items); // items = QList<QTreeWidgetItem*>
then I remove an item from my QList "items" and I try to clear/reset the QTreeWidget
packList->clear();
packList->insertTopLevelItems(0, items);
but my app crashes here!
Suggestions?
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您的问题是，调用
packList->clear()会删除树包含的树小部件项。 （请参阅有关QTreeWidget::clear()的文档，其中包含有关在删除之前从树中删除的项目的注释。）您需要找到一种方法来删除这些项目，或者不与树分开维护它们的列表。稍微相关的一点是，如果您尝试跟踪树中的其他数据，我建议您尝试使用模型范例。 在重要的情况下，通常值得我花时间转换为该技术，而不是使用小部件/项目。
Your problem is that calling
packList->clear()deletes the tree widget items contained by the tree. (See the documentation aboutQTreeWidget::clear(), which includes a note about the items being removed from the tree before deleting.) You'll either need to find a way to remove the items, or not maintain a list of them separately from the tree.On a slightly-related note, if you are trying to keep track of other data along with the tree, I'd recommend you try to use the models paradigm. In non-trivial cases, it has usually been worth my while to convert to that technique, rather than using the widgets/items.
根据此文档所说，您应该能够执行以下操作it with:
Which returns 删除并返回所提供索引处的项目。
From what this documentation says, you should be able to do it with:
Which returns removes and returns the item at the supplied index.