Fundamentals of NSNotificationCenter in Swift

This article provides a comprehensive guide to using NSNotificationCenter in Swift for iOS development, updated for Xcode 8 and Swift 3.0. It clarifies that NSNotificationCenter is not related to push notifications but serves as an internal communication tool between class or struct instances. The tutorial covers the basic workflow, including defining notification keys, posting notifications, and observing them, with a fully working example on GitHub. It also compares NSNotificationCenter to delegation, helping developers choose the right approach. The content is technical and focused on software development for Apple platforms.