问题描述
我正在尝试从 QTableWidget 中删除所有行.这是我尝试过的.
I am trying to delete all rows from a QTableWidget . Here is what I tried.
for ( int i = 0; i < mTestTable->rowCount(); ++i )
{
mTestTable->removeRow(i);
}
我的桌子上有两行.但这只是删除了一行.原因可能是我没有创建具有固定表大小的表. rowCount()的Qt文档说,
I had two rows in my table. But this just deleted a single row. A reason could be that I did not create the the table with a fixed table size. The Qt Documentation for rowCount() says,
默认情况下,对于没有行数和列数的表,该属性的值为0.
By default, for a table constructed without row and column counts, this property contains a value of 0.
如果是这种情况,从表中删除所有行的最佳方法是什么?
So if that is the case, what is the best way to remove all rows from table?
推荐答案
只需使用以下命令将行计数设置为0:
Just set the row count to 0 with:
mTestTable->setRowCount(0);
它会通过调用 removeRows
来自动删除 QTableWidgetItem
,就像您在 QTableWidget
内部模型代码中看到的那样:
it will delete the QTableWidgetItem
s automatically, by calling removeRows
as you can see in QTableWidget
internal model code:
void QTableModel::setRowCount(int rows)
{
int rc = verticalHeaderItems.count();
if (rows < 0 || rc == rows)
return;
if (rc < rows)
insertRows(qMax(rc, 0), rows - rc);
else
removeRows(qMax(rows, 0), rc - rows);
}
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