Core Data iOS Essentials

Core Data iOS Essentials

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.

Core Data iOS Essentials

Credits

About the Author

Acknowledgement

About the Reviewers

www.PacktPub.com

Preface

Free Chapter

Overview

Understanding Core Data

Core Data

Data Model

Model View Controller (MVC)

Core Data API

Overview of the application: Sales Record System for a Departmental Store

Entity Relationship Diagram

An application output sample

Automatic Master Product Update

Summary

Understanding Objective-C Protocol and Table View

Protocol

Creating a sample application using a protocol and a delegate

Introduction to Table View

Creating an application to display Table View cells

Adding names to the Table View

Summary

Designing a Data Model and Building Data Objects for Customers

Creating a new project

Designing the data model

Building data objects for the Customer entity

Understanding code of autogenerated files

Summary

Creating, Listing, and Deleting Names of Customers

Splitting the task into two modules

Creating a module to save and delete a customer's name

Key value coding (KVC)

Implementing the methods of the NSFetchedResultsControllerDelegate protocol

Running the project

Summary

Creating, Listing, Displaying, and Deleting Records of Customers

Understanding multiple managed object context

Applying the concept of multiple managed object context in our application

Enhancing our application to save, list, display, and delete customer information

viewDidLoad method

cell AtIndexPath method

didSelectRowAtIndexPath method

addCustomer method

addcustomerController method

Summary

Updating and Searching Records of Customers

Applying the update feature

Using KVO to know what has been updated

Running the project

Applying search facility

Understanding NSPredicate

Removing the keyboard after selecting a customer's name

Using Predicate Builder for creating a search criterion

Summary

Entering, Saving, Listing, and Deleting the Records of the Products Sold to the Customers

Adding the product entity to the Data Model

Relationship

Establishing a relationship between the Customer and the Product entities

Building the data object for the Customer and the Product entities

Entering the information of the products sold to the customers

Creating a module to develop an interface to enter the product information

Developing a module to create a menu for manipulating the product information

Creating a module to connect the Product's menu to the rest of the project

Running the project

Summary

Entering, Displaying, and Deleting the Stock

Adding the MasterProduct entity to the Data Model

Storing the image of the MasterProduct

Building the data object for the MasterProduct entity

Maintaining the MasterProduct information

Summary

Editing the Stock Information

Module to connect the MasterProduct's menu to the rest of the project

Running the application

Module to modify the information of the master product

Summary

Displaying the Products for Sale and Updating the Stock

Displaying the products available for sale

Updating the stock

Automatically updating the quantity of the product in the MasterProduct entity

Versioning

Migrations

Summary

Appendix

Customer Reviews

5 star

4 star

3 star

2 star

1 star

Module to modify the information of the master product

This module will display the information of the selected master product and will allow us to modify its contents (product name, quantity, price, and its image).

The following are the steps involved in developing this module:

1. Adding the View Controller class: EditMasterProductController to display the view to modify the selected master product.
2. Defining the outlets and action methods in the header file: EditMasterProductController.h.
3. Designing the View of the EditMasterProductController class.
4. Coding in the implementation file: EditMasterProductController.m to modify the master product's information.
5. Importing the delegate and the View Controller class, EditMasterProductController in the MasterProductInfoController's header file.
6. Coding in the implementation file, MasterProductInfoController.m to invoke the View of the EditMasterProductController class.

Core Data iOS Essentials

Core Data iOS Essentials

Overview of this book

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Core Data iOS Essentials

Module to modify the information of the master product

Adding the View Controller class to display the view to modify the...