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

Creating a sample application using a protocol and a delegate

We will begin developing our actual application, Sales Record System for Departmental Store from Chapter 5, Creating, Listing, and Deleting Names of Customers. In this chapter, we will develop a small application that is meant for making you better understand the concept of protocol and delegate. The application that we are going to develop is a nice example of a class adopting a protocol. Here, we'll define a protocol called SecondViewControllerDelegate, which has two methods: sum and multiply. These two methods are used to calculate the sum and product of two numbers. The class that will conform to this protocol is called demodelegateViewController. It will implement the two protocol methods, sum and multiply. We will see how the delegate methods are invoked to calculate the sum and product of two numbers entered by the user:

  1. 1. Launch Xcode and select the New Project option from the File menu. The New Project Assistant window...