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nathanclark/gist:1230034

Created September 20, 2011 19:14
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I need yesterday's date just after midnight
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gistfile1.m
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
[gregorian autorelease];
NSCalendarUnit unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDateComponents *component =[gregorian components:unitFlags fromDate:[[NSDate date] addTimeInterval: -86400.0]];
[component setHour:0]; //12a.m.
[component setMinute:0];
[component setSecond:1];
NSDate *yestedayAtMidnight = [gregorian dateFromComponents:component];
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