Sams Teach Yourself Cocoa Touch™ Programming in 24 Hours

Hour 18. Using Core Data

What You’ll Learn in This Hour:

• Using NSSortDescriptor and NSPredicate

• Using Core Data

• Using Xcode to design objects

Core Data lets you load and save objects to storage transparently by providing a single object definition instead of writing your own classes and your own serialization code. Core Data can use SQLite as a storage medium, letting you easily write iPhone tools that manipulate databases that would not fit in memory. In this hour, you’ll learn how Core Data works so that you understand its performance characteristics.

Using NSSortDescriptor and NSPredicate

Core Data relies heavily on NSSortDescriptor and NSPredicate. Hour 17, “Using the SQLite Database,” pointed out that using code to directly access ...