using KVO to update an NSTableView filtered by an NSPredicate
- by KingRufus
My UI is not updating when I expect it to.
The application displays "projects" using a view similar to iTunes -- a source list on the left lets you filter a list (NSTableView) on the right. My filters update properly when they are examining any simple field (like name, a string), but not for arrays (like tags).
I'm removing a tag from one of my objects (from an NSMutableArray field called "tags") and I expect it to disappear from the list because it no longer matches the predicate that is bound to my table's NSArrayController.
ProjectBrowser.mm:
self.filter = NSPredicate* srcPredicate =
[NSPredicate predicateWithFormat:@"%@ IN %K",
selectedTag,
@"tags"];
Project.mm:
[self willChangeValueForKey:@"tags"];
[tags removeAllObjects];
[self didChangeValueForKey:@"tags"];
I've also tried this, but the result is the same:
[[self mutableArrayValueForKey:@"tags"] removeAllObjects];
Interface Builder setup:
a ProjectBrowser object is the XIB's File Owner
an NSArrayController (Project Controller) has its Content Array bound to "File's Owner".projects
Project Controller's filter predicate is bound to "File's Owner".filter
NSTableView's column is bound to "Project Controller".name
