qt中删除tableview中的选中行

 //删除数据库中的选中行

 QItemSelectionModel *selections = ui->tableView->selectionModel();

 QModelIndexList selected = selections->selectedIndexes();

	QMap<int, int> rows;

	foreach (QModelIndex index, selected)

      rows.insert(index.row(), 0);

	QMapIterator<int, int> r(rows);

	r.toBack();

	while (r.hasPrevious()) {

           r.previous();

	   model->removeRow(r.key());

	}

    //得到id 并删除数据库数据
    int curRow = ui->tableView->currentIndex().row();
    QModelIndex index = ui->tableView->currentIndex();
    int id=index.sibling(curRow,7).data().toInt();
	//删除数据库中数据
 QSqlQuery query;
        query.prepare("delete from table where id =:id ");
        query.bindValue("id",id);
        query.exec();
        if(!query.isActive()){
            QMessageBox::critical(this,QString::fromLocal8Bit("提示"),QString::fromLocal8Bit("删除数据失败!"));
            return;
        }