NSOutlineView ReloadItem Does Not Work

Question

When calling reloadItem() on my NSOutlineView items do not seem to be updated. ReloadData() updates them fine. As does rowForItem() followed by reloadDataForRowIndexes().

Through debugging I have discovered viewForTableColumn() is never called after a ReloadItem(). This seems strange as why then does this function exist?

So why don't I just use rowForItem() & reloadDataForRowIndexes() you say. Because if the item has isGroupItem returning true, then reloadDataForRowIndexes does nothing. I think I read somewhere that this is because the groupItems do not have columns or something?

Therefore I cannot update the groupItem rows in my NSOutlineView without calling reloadData(). This prevents me using any insert and delete animations... and I want animations.

Has anyone found a way to update groupItem rows using reloadItem??? or any other way which doesn't need to reload entire outline view?

Best,

Gavin

Oh I am using swift & cocoa in case that matters. Also the NSOutlineView is View Based — Gavin, Mar 07 '15 at 02:07
looks similar to http://stackoverflow.com/questions/19963031/nsoutlineview-reloaditem-has-no-effect?s=1|2.7867 — Wizard of Kneup, Jan 15 '16 at 20:33

score 0 · Answer 1 · answered Jul 02 '18 at 04:45

Old question but i still came across this today after hours of having similar problems. Anyhow i eventually found this on the developer forums https://forums.developer.apple.com/thread/68477

Essentially an NSOutlineView compares via reference with all of its for item: Any? functions which means structs will not work.

Change my structs to classes did the trick

NSOutlineView ReloadItem Does Not Work

1 Answers1