# value(withUniqueID:inPropertyWithKey:) Retrieves an object by ID from the collection specified by the passed key. ``` func value(withUniqueID uniqueID: Any, inPropertyWithKey key: String) -> Any? ``` ## Discussion The method `valueInWithUniqueID:` is invoked if it exists. Otherwise, raises an `NSUndefinedKeyException`. The declared type of `uniqueID` in the constructed method must be `id`, `NSNumber *`, `NSString *`, or one of the scalar types that can be encapsulated by `NSNumber`. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)