Core Data Apple s API for Persisting Data on Mac OS X by Marcus S Zarra Core Data Apple Developer Documentation Core Data Programming Guide What Is Core Data Core Data Programming Guide developerle
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Core Data Apple Developer Documentation Use Core Data to save your application s permanent data for offline use, to cache temporary data, and to add undo functionality to your app on a single device Through Core Data s Data Model editor, you define your data s types and relationships, and generate respective class definitions. Core Data Programming Guide What Is Core Data Mar , For the latest information about Apple SDKs, visit the documentation website Core Data is a framework that you use to manage the model layer objects in your application It provides generalized and automated solutions to common tasks associated with object life cycle and object graph management, including persistence. Core Data Programming Guide developerle Creating NSManagedObject Subclasses By default, Core Data returns NSManagedObject instances to your application However, it is useful to define subclasses of NSManagedObject for each of the entities in your model Speciflcally, when you create subclasses of NSManagedObject, you can define the properties that the entity can use for code completion, and you can add convenience methods to those Core Data Programming Guide developerle Mar , Core Data uses a schema called a managed object model an instance of NSManagedObjectModel In general, the richer the model, the better Core Data is able to support your application A managed object model allows Core Data to map from records in a persistent store to managed objects that you use in your application. Creating a Core Data Model Apple Developer Documentation The first step in working with Core Data is to create a data model file Here you define the structure of your application s objects, including their object types, properties, and relationships You can add a Core Data model file to your Xcode project when you create the project, or you can add it to an existing project. Core Data Apple s API for Persisting Data on Mac OS X by Core Data Apple s API for Persisting Data on Mac OS X by Marcus S Zarra Learn the Apple Core Data APIs from the ground up With Core Data, you can concentrate on designing the model for your application, and use the power of Core Data to do the rest. Core Data Core Data Core Data is an object graph and persistence framework provided by Apple in the macOS and iOS operating systems It was introduced in Mac OS X . Tiger and iOS with iPhone SDK . It allows data organized by the relational entity attribute model to be serialized into XML, binary, or SQLite stores. NSManagedObjectModel Core Data Apple Developer The model contains one or NSEntity Description objects representing the entities in the schema Each NSEntity Description object has property description objects instances of subclasses of NSProperty Description that represent the properties or fields of the entity in the schema.The Core Data framework uses this description in several ways Core Data Apple s ORM Framework for iOS and the Mac Nov , Core Data is Apple s object relational mapping framework for the Cocoa API, the programming interface used in developing applications for Mac OS X and the iOS mobile operating system Core Data isolates the developer from any underlying SQL code, while still managing the entire object lifecycle NSManagedObjectID Core Data Apple Developer This identifier forms the basis for uniquing in the Core Data Framework A managed object ID uniquely identifies the same managed object both between managed object contexts in a single application, and in multiple applications as in distributed systems.
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Title: [PDF] ↠ Unlimited É Core Data: Apple's API for Persisting Data on Mac OS X by Marcus S. Zarra (2009-11-07) : by Marcus S. Zarra ↠