The Core iOS Developer’s Cookbook, Fifth Edition

Setting Up the Fetch Request

A fetch request describes how you want to search through data. This process starts by retrieving an entity description for a given entity name. For the Person entity, that name is @"Person". The description specifies what kinds of data you want to search for.

Create a new fetch request, initializing it with the entity description you just retrieved and a batch size. A 0 batch size corresponds to an indefinite request. If you want to limit the number of returned results, set the batch size to a positive number.

Each request must contain at least one sort descriptor. This method sorts in ascending order (ascending:YES), using a sort key. As with the entity name, the sort key is a string (for example, @"surname"). Set ...