Class using iOS CoreData

I need to read and write data using CoreData with SQLite3 storage. The data and the methods of manipulation are described below. I would like the classes and a simple application that demonstrates the use of all methods. I imagine there will be two classes: The class Record would represent a single data record with fields: dateTimeStamp, an NSDate count, an integer isEdit, a boolean The class DataBase would give access to the Record objects. It would have (at least) methods: addRecord: (NSDate*) dateStamp : (int) count, (BOOL) isEdit adds a record to the database setListener: (id) listener sets a listener object; A listener implements a method something like: - (void) recvRecord: (RecordObject)record; to receive calls from the get* methods below getAllRecordsEQDate: (NSDate*) date sends all records with dateTimeStamp equal to date as Record objects one by one to the listener Only the date portions of date and dateTimeStamp are used. The time is ignored. getAllRecordsGEDate: (NSDate*) minDate sends all records with dateTimeStamp greater than or equal to minDate as Record objects one by one to the listener Only the date portions of date and dateTimeStamp are used. The time is ignored.