什么是删除QStandardItemModel的多个索引的正确方法? [英] What's the right way to remove multiple indices for a QStandardItemModel?

问题描述

我试图删除QTableView的所有选定索引，

I was trying to remove all selected indices of a QTableView,

现在我使用:

foreach (const QModelIndex & idx, model->selectionModel()->selectedIndexes())
{
    model->removeRow (idx.row()); // Obviously bug
}

一个明显的问题是，一旦您删除了该行，行ID就会失效，

There's a obvious problem that once you remove the row, the row id is invalidated, w

由于没有直接获取索引的函数(或者索引是否像迭代器一样，当数据更改时会失效?)，所以我不知道该怎么做.

As there's no function that takes directly the index (or does the index act like a iterator that will get invalidated when data changed?), I don't know what to do.

推荐答案

有QPersistanceModelIndex类保留索引的有效状态.我尝试过，而且似乎可以正常工作.

There is QPersistanceModelIndex class which keeps valid state of index. I tried and it seems to be working.

QList<QPersistentModelIndex> indexes;

foreach (const QModelIndex &i, ui->tableView->selectionModel()->selectedIndexes())
    indexes << i;

foreach (const QPersistentModelIndex &i, indexes)
    ui->tableView->model()->removeRow(i.row());

我希望这会有所帮助.

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