Predicados y descriptores de ordenación

As data grows you rarely want every row. Predicates and sort descriptors let you fetch just the right slice.

An NSPredicate is a rule that decides which records match, written in a compact query-like format string.

Use operators like ==, >, and < in the format string to match numbers, dates, and other fields.

Insert dynamic values with %@ placeholders instead of string-building, which is safer and clearer.

Match partial text with CONTAINS, and add [c] to ignore case for friendly search.

Join rules with AND and OR to express more specific filters in one predicate.

A SortDescriptor tells Core Data which attribute orders the rows, and in which direction.

Pass an array of descriptors to break ties, like sorting by priority first, then by name.

Combine both in a @FetchRequest to fetch a filtered, ordered set right inside your view.

Letting the store filter and sort is faster than fetching everything and trimming it in Swift. ⚡

You can rebuild a predicate from a search field and reassign it, so results refine as the user types.

You can now filter and order data. Quick check on the tools.

You used predicates to filter records and sort descriptors to order them, fetching exactly the data each screen needs. ✨