Question

求教一个关于CoreData里NSPredicate的用法问题

Answer 1

NSDate *endDate = [NSDate date];
NSTimeInterval timeInterval= [endDate timeIntervalSinceReferenceDate];
timeInterval -=3600*24;
NSDate *beginDate = [NSDate dateWithTimeIntervalSinceReferenceDate:timeInterval];
//过期的日期
NSPredicate *predicate_date =
[NSPredicate predicateWithFormat:@"date <= %@", beginDate];

[fetchRequest setPredicate:predicate_date];