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

addcustomerController method

The addcustomerController method is the implementation method for the delegate of the AddCustomerController class and is invoked by the cancel and save methods (defined in the implementation file of the AddCustomerController class). The cancel method calls the previous method and passes the selectedsave parameter set to value NO and the save method calls the method with the selectedsave parameter set to value YES. The value of the selectedsave parameter is assigned to the variable: save.

In this method, we check the value of the variable save. If the value of the save variable is NO, we delete the object (the cust object of the Customer entity class that we inserted in the preceding method) from the managed object context and save the context in the persistent store.

Finally, we dismiss the modal view of the AddCustomerController class and the View of the RootViewController appears to display the updated table view.

The delegate method: controller:didChangeObject...