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

viewDidLoad method

The viewDidLoad method sets the two Bar Button Item buttons to appear on the left and right side of the navigation bar respectively. The button displayed on left side is the Edit button and the one on the right side is the Add button. The Edit button will enable us to delete information of any customer and the Add button will take us to the View of the AddCustomerClass to enter information of the new customer. The title of the navigation item is set to display Customers List. After the creation and initialization of the left and right side bar button items of the navigation bar, the performFetch: message is invoked on an object returned by the fetchedResultsController method to display the result retrieved in the fetchedResultsController (that is, existing customer's list). Recall that the fetchedResultsController contains the entities specified by the fetch request, arranged on the attribute specified by the sort descriptor.