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PONSPredicate filtering with NSManagedObject's helper method
 

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  1. PONSPredicate filtering with NSManagedObject's helper method
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    <p>I have a UITable view which contains a list of NSManagedObjects called Assignment. I am using NSPredicate to filter the list. I am filtering assignments that should be shown for today and yesterday for a player:</p> <pre><code>NSPredicate *predicate = [NSPredicate predicateWithFormat: @"player == %@ AND (day == %@ OR day == %@)", player, [NSNumber numberWithInt:[self todaysDayNumber]], [NSNumber numberWithInt:[self yesterdaysDayNumber]]]; </code></pre> <p>I need to add an additional level of filtering. I want to filter out assignments that should only be shown biweekly. So I added this methods to Assigment: </p> <pre><code>-(BOOL)thisWeeks{ //If this is a weekly assigment if ([self.weekly boolValue]) { return YES; } //Determine the week number NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSWeekCalendarUnit; NSDateComponents *dateComponents = [calendar components:unitFlags fromDate:[NSDate date]]; NSUInteger week = [dateComponents week]; //Assigned week even? if ([self.weekNumber intValue] % 2){ //Current week even? if (week % 2) { return YES; } } //Assigned week odd? if (!week % 2) { //Current week odd? if (![self.weekNumber intValue] % 2){ return YES; } } //Should not be shown this week. return NO; } </code></pre> <p>is it possible to use this helper method "thisWeeks" as a filter in NSPredicate?</p> <p>If I'm "doing it wrong", I could manually filter the fetched results, but I am unsure as to how I would put the results back into NSFetchedResultsController such that my UITable view could continue using NSFetchedResultsController.</p>
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    1. USNathan Clark
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