Question 1

How to save and load custom Codable objects with Cache in Swift?

Accepted Answer

Define a struct conforming to Codable, create a Storage instance with a transformer for that type, then use setObject and object methods. The README shows an example with a User struct and storage.setObject(user, forKey: 'user').

Question 2

Cache vs Kingfisher for image caching in iOS?

Accepted Answer

Cache is a general-purpose library for any Codable type, while Kingfisher is specialized for image downloading and caching with built-in networking. Use Cache for type-safe storage of various data; choose Kingfisher if you need dedicated image handling with less setup.

Question 3

How to handle errors when using the Cache library?

Accepted Answer

Wrap operations in do-catch blocks and handle the StorageError enum, which includes cases like .notFound or .decodingFailed. The README provides error handling examples for both sync and async APIs, ensuring precise debugging.

Question 4

Does Cache automatically clean up expired objects?

Accepted Answer

No, you must manually call removeExpiredObjects() to clean up expired items. However, you can configure default expiry dates in DiskConfig and MemoryConfig, and set per-object expiry with setObject.

Question 5

How to observe cache changes for real-time UI updates?

Accepted Answer

Use addStorageObserver for general changes or addObserver for specific keys, passing a closure that triggers on edits or removals. Observers are weakly captured and automatically removed when deallocated, as shown in the observations section.

Question 6

Cache or UserDefaults for storing app preferences?

Accepted Answer

Cache offers more features like type safety, expiry, and hybrid storage, while UserDefaults is simpler for small key-value pairs. Use Cache for structured, complex data; UserDefaults for basic settings without serialization needs.

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