Question 1

How do I use EmitterKit to listen for keyboard notifications in Swift?

Accepted Answer

Use the Notifier class to wrap UIKeyboardWillShowNotification, then call on or once with a closure to handle the Notification object, providing a type-safe alternative to NSNotificationCenter.

Question 2

EmitterKit vs Combine: which is better for simple event handling?

Accepted Answer

EmitterKit is lighter and more straightforward for basic type-safe events and KVO, while Combine is integrated with SwiftUI and offers more advanced operators; choose EmitterKit for simplicity and Combine for broader Apple ecosystem integration.

Question 3

How to make EmitterKit thread-safe in a concurrent app?

Accepted Answer

You must implement manual locking (e.g., using NSLock or DispatchQueue) when emitting events or managing listeners across threads, as EmitterKit itself provides no built-in concurrency safeguards.

Question 4

Can I use EmitterKit with SwiftUI?

Accepted Answer

Yes, but primarily for event handling in UIKit components or Combine integration; for native SwiftUI state management, Combine or @State is typically preferred, though EmitterKit can bridge notifications or custom events.

Question 5

What's the difference between Event and Notifier in EmitterKit?

Accepted Answer

Event<T> is a generic type-safe emitter for custom data, while Notifier wraps NSNotificationCenter events with type safety, both simplifying listeners but serving different use cases—custom events vs system notifications.

Question 6

How to migrate from NSNotificationCenter to EmitterKit?

Accepted Answer

Replace addObserver calls with Notifier instances for the same notification names, using on or once methods for type-safe handling, and ensure to retain listeners only when necessary per EmitterKit's patterns.

EmitterKit

What is EmitterKit?

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