In Chapter 1, Overview, you will see a brief history of the Core Data and a small
introduction to EOF and Xcode.
In Chapter 2, Understanding Core Data, you will have an introduction to the Core Data
framework and its features. You will learn about the data model and how it defines
the structure of data in terms of entities, properties, and their relationships. Also, you
will get a brief idea of Model View Controller (MVC), the Core Data API and its
main components. Besides this, the chapter includes an overview of the application
(Sales Record System for a Store), which we will be building in the book along with
its different views and the tasks performed when different controls in these views
are selected.
Chapter 3, Understanding Objective-C Protocol and Table View, explains how an object
collaborates with other objects through the delegation pattern. We will learn about
the working of a protocol, that is, how a protocol and its methods are defined.
We will also learn how an object adopts a protocol to act as a delegate and how a
protocol establishes a contract for communication between two objects.
Chapter 4, Designing a Data Model and Building Data Objects for Customers, introduces
the working of UITableView and explains step-by-step how information is displayed
via the table view. The chapter explains the different methods used in displaying
information through table view and also how to add more information to the existing
information being displayed via table view. For instance, if four names are already
being displayed in a table, this chapter will show how to add the newly entered
name to the existing list of names in the table.
In Chapter 5, Creating, Listing, and Deleting Names of Customers, we will be learning
how to design a data model for storing any customer's information, that is, we will
define the Customer entity and its attributes. Also, we will learn to build the data
object (classes) associated with the Customer entity.
Chapter 6, Creating, Listing, Displaying, and Deleting Records of Customers, focuses on
explaining how a customer's information, which is stored in the Customer entity, is
maintained. The chapter gives a step-by-step explanation of how to save, display,
and delete the customer information that comprises customer's name, e-mail address,
and contact number.
In Chapter 7, Updating and Searching Records of Customers, we will see how to modify
the customer information, which is, unlike the "editing" feature in Chapter 6 that
was limited to the deletion of a record; we will see how to update (modify) the
information of the existing customers. The chapter explains the procedure to add an
Edit button to the view, which when selected will allow us to edit the information of
the selected customer. This chapter also covers how to save the modified information
back to the persistent store. In this chapter, we will also learn the application of
NSPredicate to apply query facility to locate the desired customer quickly.
Chapter 8, Entering, Saving, Listing, and Deleting the Records of the Products Sold to
the Customers, explains how to store the information of the products purchased by
different customers, we will learn to add the Product entity to our existing data
model and we will see how the relationship is established from the Customer entity
to the Product entity. The chapter also explains how the inverse relationship is set
from the Product entity to the Customer entity and finally, the procedure of building
data objects for the modified data model. Also, we will learn how to maintain the
product's information, that is, how to enter, save, display, and edit the information
of the products that are sold to different customers. We will learn how to develop
a view to enter the product's information, develop a product's menu to add, edit,
and display the products sold to the selected customer and finally, to connect the
product's menu to the rest of the application.


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