objective c - Core Data Predicate Date Comparison -

im trying fetch objects in entity matching user selecteddate (it's nsdate). core data code fine predicate keeps returning 0 results, dates same in database user selecting.

how should selecteddate compared date entity using predicate?

nspredicate *predicate = [nspredicate predicatewithformat:@"(edate = %@)", selecteddate]; 

your predicate looks fine.

the reason you're finding 0 result returned may dates aren't entirely same.

for example:

05/04/2012 13:37:00 not match 05/04/2012 13:37:01 these 2 values not same.

do want check date (day, month, year) time?

if want check date, should create start date , end date , compare them using user selected date frame of reference.

something similar should create date , time 00:00:00.

//gather current calendar nscalendar *calendar = [nscalendar currentcalendar];  //gather date components date nsdatecomponents *datecomponents = [calendar components:(nsyearcalendarunit | nsmonthcalendarunit | nsdaycalendarunit) fromdate:[nsdate date]];  //set date components [datecomponents sethour:0]; [datecomponents setminute:0]; [datecomponents setsecond:0];  //return date relative date return [calendar datefromcomponents:datecomponents]; 

create date setting hours, minutes , seconds 23:59:59 , check user selected date falls between these ranges.

[nspredicate predicatewithformat:@"date between %@", [nsarray arraywithobjects:startofday, endofday, nil]]