It is the first time for me working with AppKit and a NSTableView. It is backed by a NSFetchedResultsController for Core Data. When there are changes to the dataset, a Notification is being sent: f...

I run into performance issues with the diffable data source when having a larger data set, around 22,000 items. I am surprised that applying the snapshot takes so much time when animation is ON. Se...

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 b...

Glitch I am using CoreData with a NSFetchResultController to have data displayed in a UITableView. I have one problem: the UITableView changes the contentOffSet.y when a new row is inserted/moved/d...

- (void)fetchResult { NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"Project" ascending:YES]; [request set...

CoreData: error: (NSFetchedResultsController) The fetched object at index 72 has an out of order section name 'อั. Objects must be sorted by section name' I am using the following code to sort ...

Let's say I have two entities, Employee and Department. A department has a to-many relationship with an employee, many employees can be in each department but each employee only belongs to one depa...

When dealing with CoreData, NSFetchedResultsController and Diffable Data Source, I always notice that I need to apply DispatchQueue.main.async. For instance, Before applying DispatchQueue.main.asyn...

I actively use StackOverflow almost daily for more than a year by now, but this is the first question I'm asking here. No other question grasp my exact problem. Solution to close ones doesn't work ...

I'm using a UICollectionViewDiffableDataSource and a NSFetchedResultsController to populate my UICollectionView inside my UIViewController. To add the ability of reordering cells I added a UILong...

I'm having an issue getting accurate updates from an NSFetchedResultsControllerDelegate after using an NSBatchDeleteRequest, the changes come through as an update type and not the delete type on th...

I have a entity Person with a property personId (personId is unique) How can I fetch the Person with the max personId? (I want to fetch the person itself not the value of the property)

I have a Core Data model with an NSDate property. I want to filter the database by day. I assume the solution will involve an NSPredicate, but I'm not sure how to put it all together. I know how t...

Back in objective-c, I could fetch a sectioned list of objects from Core Data using something like this: self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:f...

I encountered an NSObjectInaccessibleException that I can not understand: *** Terminating app due to uncaught exception 'NSObjectInaccessibleException', reason: 'CoreData could not fulfill a faul...

I started to receive warning (below) on iOS13. I have noticed that this warning pops up because UITableView's window is null (another tab is selected, pushed detailed view controller on table selec...

I am currently trying to setup a NSFetchedResultsController that will order my table view based on the number of entities in a to-many relationship. I am not sure if this makes a difference when co...

I'm seeing a situation where a NSFetchRequest returns a different number of objects depending on whether it's executed directly through the NSManagedObjectContext or as part of building a NSFetched...

Xcode 11.0 Swift 5.1 I'm working on a "simple" app using Core Data. The single Core Data entity is named Topic and comprises Title (String), Details (String) and isFavorite (Bool) I'm using a c...

I am using a fairly standard setup of NSTableView + CoreData + NSFetchedResultsController, with the relevant view controller being NSFetchedResultsControllerDelegate to receive the changes. Here ar...

I have an entity called “Event“ which has s start and end date properties. I have to show the list of events by grouping them by date in UI. I am using NSFetchedResultsController to fetch and list ...

How can I get number of objects in section of an NSFetchedResultcController in Swift? if let s = self.fetchedResultsController?.sections as? NSFetchedResultsSectionInfo { } is giving me Canno...

During swype deleting (most importatnt lines of this method): - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath...

I'm writing an app with two tables on one screen. The left table is a list of folders and the right table shows a list of files. When tapped on a row on the left, the right table will display the f...

In my application, I have a NSFetchedResultsController to load Core Data objects in a UITableView. The fetch request associated with this FRC uses the new viewContext property available for the NSP...