What is NSFetchedResultsController?
A controller that you use to manage the results of a Core Data fetch request and to display data to the user.
When should we use NSFetchedResultsController class?
NSFetchedResultsController is a very useful class provided by the CoreData framework. It solves many performance issues you frequently run into while reading a large amount of data from database and displaying that data using a UITableview, UICollectionView or MKMapView.
What is Nsmanagedobjectcontext?
An object space to manipulate and track changes to managed objects.
What is NSManagedObjectModel?
NSManagedObjectModel provides an API to retrieve a stored fetch request by name, and to perform variable substitution—see fetchRequestTemplate(forName:) and fetchRequestFromTemplate(withName:substitutionVariables:) . You typically define fetch request templates using the Data Model editor in Xcode.
What is swift UICollectionView?
An object that manages an ordered collection of data items and presents them using customizable layouts.
What is NSManagedObjectContext?
What is Nsmanagedcontext?
What is persistent store coordinator?
A persistent store coordinator is an instance of NSPersistentStoreCoordinator . It has a reference to a managed object model that describes the entities in the store or stores it manages. The coordinator is the central object in a Core Data stack.
What is a Tableview Swift?
A table view is an instance of the UITableView class, which is a subclass of UIScrollView. Table view cells, which are the repeatable rows, or views, shown in the table view. A table view cell is an instance of a UITableViewCell class, and that class is often subclassed to create custom table view cells.
Can we have multiple persistent store coordinator?
We can have only one Persistent Store Coordinator for each model.
What is Persistentcontainer in Core Data?
NSPersistentContainer simplifies the creation and management of the Core Data stack by handling the creation of the managed object model ( NSManagedObjectModel ), persistent store coordinator ( NSPersistentStoreCoordinator ), and the managed object context ( NSManagedObjectContext ).
What is Swift UICollectionView?
How does the nsfetchedresultscontroller cache data?
When you initialize an instance of NSFetchedResultsController, you typically specify a cache name. (If you do not specify a cache name, the controller does not cache data.) When you create a controller, it looks for an existing cache with the given name:
What is a fetched results controller in Salesforce?
A controller that you use to manage the results of a Core Data fetch request and to display data to the user. While table views can be used in several ways, fetched results controllers primarily assist you with a primary list view. UITableView expects its data source to provide cells as an array of sections made up of rows.
What happens when I set a delegate for a fetched results controller?
If you set a delegate for a fetched results controller, the controller registers to receive change notifications from its managed object context. Any change in the context that affects the result set or section information is processed and the results are updated accordingly.