iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK

Core Data Environment

The project template sets up the Core Data environment for the project in the class that implements the UIApplicationDelegate protocol; in the sample app this is ICFAppDelegate. The project template uses a lazy-loading pattern for each of the properties needed in the Core Data environment, so each is loaded when needed. For more information about the Core Data environment, refer to Chapter 12, “Core Data Primer.”

The process of loading the Core Data environment is kicked off the first time the managed object context is referenced in the app. The managed object context accessor method will check to see whether the managed object context instance variable has a reference. If not, it will get the persistent store coordinator ...