Book Image

Core Data iOS Essentials

By : Bintu Harwani, B. M. Harwani
Book Image

Core Data iOS Essentials

By: Bintu Harwani, B. M. Harwani

Overview of this book

Core Data is the essential ingredient in data driven iOS apps. It's used for storing, retrieving, and manipulating application data in databases, XML, and binary formats. It's an essential component for iPhone, iPod Touch, and iPad apps.Core Data Essentials provides a clear, readable guide to the most useful aspects of Core Data. Built around a realistic example app, the book showcases the most important aspects of Core Data development in the context of a complete, functioning app written in Objective C.The book starts with a tour of how the app works. Then you'll see how to easily display data using the Table View. You'll learn how to develop an appropriate data model that fits the needs of your app, then implement that model as updatable data objects. You'll see how to update data and build relationships between objects and learn how Core Data can work with search, and how to provide your users with friendly data editing features.
Table of Contents (19 chapters)
Core Data iOS Essentials
About the Author
About the Reviewers

Applying the concept of multiple managed object context in our application

To apply the concept of multiple managed object context in our application, we will create a separate instance of managed object context with the name custcontext and associate it with the View of the AddNameController class. That is, the name of the customer added by the user in the View of AddNameController class will be stored in this separate context (custcontext) and not in the application's main context: managedObjectContext. When the Save button is selected (in the View of AddNameController class), a NSNotification with the NSManagedObjectContextDidSaveNotification key will be broadcasted that invokes a method, which consequently invokes the mergeChangesFromContextDidSaveNotification on the main managed object of the application: managedObjectContext, so that it incorporates all the changes (new customer names added) to the managed object context: custcontext.

To implement the multiple managed object context...