Core Data fetch by Date

CoreDataMatchDate

+(NSPredicate *)dateMatcher:(NSDate *)date forAttribute:(NSString *)attributeName{
 
 
 
    //First set the unit flags you want automatically put into your date from an NSDate object
 
    unsigned startUnitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit; 
 
    //now create an NSCalendar object
 
    NSCalendar *startCal = [NSCalendar currentCalendar];
 
    //Use the NSCalendar object to create an NSDateComponents object from the date you are interested in rounding
 
    //In this case we are just using the time now by calling [NSDate date]
 
    NSDateComponents *minDateComps = [startCal components:startUnitFlags fromDate:[NSDate date]];
 
    //Now we use the NSCalendar object again to generate a date from the date components object
 
    NSDate *startDate = [startCal dateFromComponents:minDateComps];
 
 
 
 
 
    //First set the unit flags you want automatically put into your date from an NSDate object
 
    unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit; 
 
    //now create an NSCalendar object
 
    NSCalendar *cal = [NSCalendar currentCalendar];
 
    //Use the NSCalendar object to create an NSDateComponents object from the date you are interested in rounding
 
    //In this case we are just using the time now by calling [NSDate date]
 
    NSDateComponents *maxDateComps = [cal components:unitFlags fromDate:[NSDate date]];
 
    //now set the hours, minutes and seconds to the end of the day
 
    maxDateComps.hour = 23;
 
    maxDateComps.minute = 59;
 
    maxDateComps.second = 59;
 
    //Now we use the NSCalendar object again to generate a date from the date components object
 
    NSDate *endDate = [cal dateFromComponents:maxDateComps];
 
 
 
 
 
    // Finally create the predicate with the correct format
 
    return [NSPredicate predicateWithFormat:@"(%K >= %@) AND (%K <= %@)",attributeName, startDate, attributeName, endDate];