Professional iOS Database Application Programming, 2nd Edition

Chapter 7

Building a Core Data Application

WHAT’S IN THIS CHAPTER?

• Fetching data using the NSFetchedResultsController
• Filtering and sorting your data using NSPredicate and NSSortOrdering
• Displaying related data using the UITableView
• Implementing complex validation and default values using custom subclasses of NSManagedObject

WROX.COM CODE DOWNLOADS FOR THIS CHAPTER

The wrox.com code downloads for this chapter are found at www.wrox.com/remtitle.cgi?isbn=1118391845 on the Download Code tab. The code is in the Chapter 7 download and individually named according to the names throughout the chapter.

In the previous chapter, you explored the Xcode Data Modeling tool and learned how to graphically create a data model. In this chapter, you discover how to build a complete data-driven application using Core Data. You learn how to fetch, filter, and sort your data and display it in a UITableView using the NSFetchedResultsController. You also discover how to modify and delete existing data and take advantage of the relationships that you have defined between your data entities. Finally, you learn how to implement complex validation rules and default values using custom subclasses of NSManagedObject.

I introduced these topics in the Chapter 6. In this chapter, you build a fully functional task manager application while putting the concepts that you learned in the previous chapter into action.

THE TASKS APPLICATION ARCHITECTURE

Before you sit down to start coding a new application, it is ...