setColumnHidden does not work

[yangyanhui4]

hI,I have a qtableview. when I use setColumnHidden to hide a column,it works.But when I setColumnHidden (int ,false) to show it ,it fails
if (col->isHide)
ui->tableView->setColumnHidden(columnIndex, true);
else
ui->tableView->setColumnHidden(columnIndex, false);
when the last line of code runs,nothing happened
what may be the problem

[jsulm]

@yangyanhui4 said in setColumnHidden does not work:

ui->tableView->setColumnHidden(columnIndex, false);

You really verified that this line is executed?
Did you also verify that columnIndex is correct?

[yangyanhui4]

yes,I can be sure the columnindex is true and the code runs.

[yangyanhui4]

I think I find the problem.The width of the hidden column is set to zero. As a result, the column does not show.but why?when i hide a column,its width is set to zero automatically?

[Christian Ehrlicher]

Why should a column with a width of 0 be shown?
Also you should not set a column width of 0 by yourself - use hide/show functions instead.