nsfetchedresultscontroller

What is the best practice to filter the NSFetchedResultsController data? do i need to re-initialize it every time the searchbar's text changes? I am using a UISearchDisplayControllers and i'm implementing: - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString; Thx. dk. How is Guy's answer code any different from the question? As far as I can guess, the filterContentForSearchText:scope method is called by the shouldReload methods? Anyway, here's some similar code that I added in the CoreDataBooks sample to include

Objective: Using FRC, sort Section's by startDate , an NSDate attribute, but want Today 's date Section to appear before Upcoming dates Section . I followed Apple's code using a transient property sectionIdentifier . Apple's sample code . and started with this project first: OneFRC I soon realized that this may not be possible with just one FRC (I could be wrong). Next, I decided to take a stab at this with 3 FRCs : ThreeFRC . TableView sections now appears in the Order that I want: Section 0: Today Section 1: Upcoming Section 2: Past However, adding data triggers FRC delegates, and I get the

I populate and save: an initial NSManagedObjectContext setup an NSFetchedResultsController with a different NSManagedObjectContext , which filters on a boolean "show" attribute. Finally update "show" on yet another NSManagedObjectContext and save: . I expect that this should cause my NSFetchedResultsController to call NSFetchedResultsControllerDelegate 's controllerDidChangeContent: . I never get that call. NSFetchedResultsController with predicate ignores changes merged from different NSManagedObjectContext 's accepted answer indicates that in addition to controllerDidChangeContent: , I

I have a UITableView that displays a subset of a large number of entities named "Documents". The subset is defined by another entity "Selection". Selections are named, ordered list of documents. It Works fine, except when I want to change the displayed selection at run time. I get only a blank list. Basically, I need to change the predicate that my NSFetchedResultsController holds so that the new predicate uses the another Selection. I couldn't make it work. My last attempt is to get rid of the NSFetchedResultsController altogether and reallocate it: - (void) displaySelection:(Selection *)aSet

What I want to do is pretty simple. In my UITableViewController, I want to load data from multiple NSFetchedResultControllers (I have multiple entities in my data model) and put data from each one into a different section in the table view. So for example, all the fetched items from the first NSFetchedResultController would go in section 0 in the UITableView, the fetched items from the other one goes into section 1, etc. The Core Data template project doesn't demonstrate how to do this. Everything (mainly the index paths) is coded without taking sections into account (there are no sections in

This is an error: CoreData: error: Serious application error. An exception was caught from the delegate of NSFetchedResultsController during a call to -controllerDidChangeContent:. attempt to delete and reload the same index path ( {length = 2, path = 0 - 0}) with userInfo (null) This is my typical NSFetchedResultsControllerDelegate : func controllerWillChangeContent(controller: NSFetchedResultsController) { tableView.beginUpdates() } func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: