Question

I have an entity with a date field and I would like to select the records for a given year. How to build a NSPredicate for the job? Didn’t find anything about date functions (if any) in Core Data

thanks

Answer 1

A possible method:

Step 1) See “Creating a Date from Components” from Apple’s “Date and Time Programming Guide.” Make an NSDate representing the beginning of the year, and an NSDate representing the end of the year.

Step 2) Then you could build a predicate that searches for objects with date attrs that are greater than the first date and less than the last date.

The predicate would look something like this:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@“(inceptionDate > %@) AND (inceptionDate < %@)”, dateBeginYear, dateEndYear];