Question

I have an NSFetchedResultsController displaying “places” in a table view, but when I update the set of places that should be displayed in another view controller, my FRC does not update the table view.

That’s the general problem. My specific case seems to revolve around the NSPredicate backing my FRC, because when I remove the NSPredicate (and just get all places), everything works fine.

My query is

@"ANY photos.isFavorite == %@", [NSNumber numberWithBool:YES]

places have a one-to-many relationship with photos (I am working through CS193P). Perhaps my FRC is not set up to observe changes in a related table or something?

A bit of additional information about my situation:

• My Core Data updates and queries seem okay, as my “places” table is always correct when I first load the application.
• My FRC does update rows that are already present at application load. It just won’t insert new rows/sections at runtime.
• I am only using a single MOC.
• My sectionNameKeyPath is not set to a transient attribute.
• My cacheName is set to nil.

Answer 1

I don’t know if it’s your case but I’ll post anyway. Maybe it could be a valid workaround.

NSFetchedResultsController pitfall

Hope it helps.