nsfetchedresultscontroller

I have a set of entity objects in my iOS Core Data database that describe something at a location. Let's call the entity Location. I have implemented this by having two attributes on Location that refer to the location - latitude and longitude, both doubles. There are other elements, like name. I am using a NSFetchedResultsController to bind the entities to a UITableViewController. What I would like to do is have the results sorted by distance to a given CLLocationCoordinate2D. In an really ideal scenario, I'm able to refresh that list to recalculate the sort based on a new location. Therefore

I have an entity being displayed in a table view in just one section. The entity has two attributes, workoutName and trainingLevel . Both are of string type. Training level consists of the 3 types: 1, 2, 3. (trainingLevel = (Integer 16 or String Type? Which would be ideal?) I would like to split the table into three sections, each section containing entries for the corresponding training level. How do I do this? The code I am currently using is below: - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; } - (NSInteger)tableView:

I'm using NSFetchedResultsController to populate my table. The data in my table is sorted according to the timestamp in the ascending order (latest message at the bottom). More data is loaded via "infinite scroll" to the top: e.g. when user scrolls past the top, more messages are loaded. My NSFetchedResultsControllerDelegate is defined as usual, as recommended in the apple documentation: new rows are inserted via - (void)controller:(NSFetchedResultsController*)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath*)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath

I have a more or less basic UITableViewController with a NSFetchedResultsController . The UITableViewController is pushed onto the navigationController's stack. But the push animation isn't smooth because the fetch of NSFetchedResultsController is performed on the main thread, and therefore blocks the UI. My question is: How can I perform the fetch of the NSFetchedResultsController in a background thread to keep the animation smooth? The NSFetchedResultsController and the delegate methods look like this: - (NSFetchedResultsController *)fetchedResultsController { if (_fetchedResultsController !

I'm currently trying to sort my array of objects into day order so they can be grouped in the correct order i.e. Monday, Tuesday, Wednesday then by start time. Only problem is I can't figure out how to do this, my code currently looks like this: Which sorts alphabetically then by time: NSString *sectionKey = nil; switch (tab) { case kByWeekA: { NSSortDescriptor *sortDescriptor1 = [[NSSortDescriptor alloc] initWithKey:@"day" ascending:NO]; NSSortDescriptor *sortDescriptor2 = [[NSSortDescriptor alloc] initWithKey:@"starttime" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc]

Hi I'm having a hard time fixing this error. Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'no object at index 3 in section at index 0' That error exist when I delete all my Entity in coredata and refetch it. CALL API self.fetchedResultsController = nil; [NSFetchedResultsController deleteCacheWithName:nil]; [api requestForMenuCategory:@"details" managedObjectContext:self.managedObjectContext delegate:self]; EXECUTE WHEN API IS DONT FETCHING DATA if (![self.fetchedResultsController performFetch:&error]) { NSLog(@"%@",[error description]); } else{ NSLog(@