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Subject: Re: Core Data entity fetching by date

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Subject: Re: Core Data entity fetching by date

Subject: Subject: Re: Core Data entity fetching by date
From: Steve Steinitz <email@hidden>
Date: Mon, 10 Nov 2008 11:45:48 +1100

Hi,

Quincy gave such a masterful and complete answer that I felt compelled to also make a small contribution. If you decide to go the in-memory route, this simple routine may save you a few minutes of head scratching:

- (BOOL) selectedRangeContainsDate: (NSDate *) date { NSComparisonResult fromDateResult = [date compare: [self fromDate]]; NSComparisonResult toDateResult = [date compare: [self toDate]]; BOOL isAfterFromDate = (fromDateResult == NSOrderedSame) || (fromDateResult == NSOrderedDescending); BOOL isBeforeToDate = (toDateResult == NSOrderedSame) || (toDateResult == NSOrderedAscending ); return isAfterFromDate && isBeforeToDate; }

I used it in an NSArrayController subclass with a couple of date pickers but you could adapt it for programmatically-generated date ranges.

Cheers,

Steve

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