What is Nsbatchupdaterequest?
A request to Core Data to do a batch update of data in a persistent store without loading any data into memory.
How do I use NSBatchDeleteRequest?
Setting up an NSBatchDeleteRequest is fairly simple. It requires either passing in an NSFetchRequest instance or a collection of managed object identifiers. After that, you simply execute the batch delete request on your managed object context.
What is batch update in swift?
The goal of a batch update is to change one or more properties on a specific entity that is stored in a persistent store in Core Data. A batch update cannot be used to alter relationships, delete entities, or create new entities.
What is Nsmanagedobjectcontext?
An object space to manipulate and track changes to managed objects. Language. SwiftObjective-C. iOS 3.0+
What is NSPersistentStoreCoordinator in iOS?
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 NSFetchRequest?
An instance of NSFetchRequest collects the criteria needed to select and optionally to sort a group of managed objects held in a persistent store. A fetch request must contain an entity description (an instance of NSEntityDescription ) or an entity name that specifies which entity to search.
What is entity in Core Data?
An entity is represented by an instance of the NSEntityDescription class. This class provides access to a wide range of properties, such as its name, the data model it is defined in, and the name of the class the entity is represented by.
What is NSManagedObjectContext?
What is Coredatastack?
Overview. After you create a data model file as described in Creating a Core Data Model, set up the classes that collaboratively support your app’s model layer. These classes are referred to collectively as the Core Data stack.
What is Nssortdescriptor?
An immutable description of how to order a collection of objects according to a property common to all the objects.