Here's the complete example of how you can put this code together:

Understanding and Working with Parent/Child NSManagedObjectContexts: A Guide to Improved Performance, Security, and Maintainability in Core Data Applications

Mastering iOS Navigation Controllers: A Deep Dive into the AppDelegate and View Controller Hierarchy

Entering and Displaying Unicode Characters in Interface Builder for UILabels with Ease

Understanding the AudioQueue PropertyListener IsRunning Callback Only Once

Migrating an Android Application from PhoneGap to iPhone: A Step-by-Step Guide for Developers

Creating a Programmatically Colorable Grid on iPhone using UIView and Core Graphics

Understanding Background Tasks in iOS: A Deep Dive into `beginBackgroundTaskWithExpirationHandler`

Centering Text in UITextView: A Comprehensive Guide to Alignment

Troubleshooting NSPersistentStoreCoordinator Issues in iOS Apps