Learning Core Data for iOS: A Hands-On Guide to Building Core Data Applications

Introducing Thumbnailer

Thumbnailer is the name of the new class that will be used to generate photo thumbnails in the background. This class assumes the context hierarchy is configured as per Figure 11.3. To remain generic enough for reuse in other applications, this class takes the following variables:

entityName is the string name of the entity with a thumbnail attribute.

thumbnailAttributeName is the string name of the binary data attribute where the proposed thumbnail should be created. This attribute is assumed to exist in the entity specified ...