Vfrdtyky

Example on how to also set up startDate and endDate to the above given answer:

...



NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *components = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth ) fromDate:[NSDate date]];

//create a date with these components

NSDate *startDate = [calendar dateFromComponents:components];

[components setMonth:1];

[components setDay:0]; //reset the other components

[components setYear:0]; //reset the other components

NSDate *endDate = [calendar dateByAddingComponents:components toDate:startDate options:0];

predicate = [NSPredicate predicateWithFormat:@"((date >= %@) AND (date < %@)) || (date = nil)",startDate,endDate];



...

Here I was searching for all entries within one month. It's worth to mention, that this example also shows how to search 'nil' date-entires.

In Swift I got something similar to:

        let dateFormatter = NSDateFormatter()

        dateFormatter.dateFormat = "yyyy-MM-dd"

        let date = dateFormatter.dateFromString(predicate)

        let calendar = NSCalendar(calendarIdentifier: NSGregorianCalendar)

        let components = calendar!.components(

            NSCalendarUnit.CalendarUnitYear |

                NSCalendarUnit.CalendarUnitMonth |

                NSCalendarUnit.CalendarUnitDay |

                NSCalendarUnit.CalendarUnitHour |

                NSCalendarUnit.CalendarUnitMinute |

                NSCalendarUnit.CalendarUnitSecond, fromDate: date!)

        components.hour = 00

        components.minute = 00

        components.second = 00

        let startDate = calendar!.dateFromComponents(components)

        components.hour = 23

        components.minute = 59

        components.second = 59

        let endDate = calendar!.dateFromComponents(components)

        predicate = NSPredicate(format: "day >= %@ AND day =< %@", argumentArray: [startDate!, endDate!])

I had a hard time to discover that string interpolation "(this notation)" doesn't work for comparing dates in NSPredicate.

I ported the answer from Glauco Neves to Swift 2.0 and wrapped it inside a function that receives a date and returns the NSPredicate for the corresponding day:

func predicateForDayFromDate(date: NSDate) -> NSPredicate {

    let calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)

    let components = calendar!.components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: date)

    components.hour = 00

    components.minute = 00

    components.second = 00

    let startDate = calendar!.dateFromComponents(components)

    components.hour = 23

    components.minute = 59

    components.second = 59

    let endDate = calendar!.dateFromComponents(components)



    return NSPredicate(format: "day >= %@ AND day =< %@", argumentArray: [startDate!, endDate!])

}

Swift 3.0 extension for Date:

extension Date{



func makeDayPredicate() -> NSPredicate {

    let calendar = Calendar.current

    var components = calendar.dateComponents([.year, .month, .day, .hour, .minute, .second], from: self)

    components.hour = 00

    components.minute = 00

    components.second = 00

    let startDate = calendar.date(from: components)

    components.hour = 23

    components.minute = 59

    components.second = 59

    let endDate = calendar.date(from: components)

    return NSPredicate(format: "day >= %@ AND day =< %@", argumentArray: [startDate!, endDate!])

}

}

Then use like:

 let fetchReq = NSFetchRequest(entityName: "MyObject")

 fetchReq.predicate = myDate.makeDayPredicate()

Adding to Rafael's answer (incredibly useful, thank you!), porting for Swift 3.

func predicateForDayFromDate(date: Date) -> NSPredicate {

    let calendar = Calendar(identifier: Calendar.Identifier.gregorian)

    var components = calendar.dateComponents([.year, .month, .day, .hour, .minute, .second], from: date)

    components.hour = 00

    components.minute = 00

    components.second = 00

    let startDate = calendar.date(from: components)

    components.hour = 23

    components.minute = 59

    components.second = 59

    let endDate = calendar.date(from: components)



    return NSPredicate(format: "YOUR_DATE_FIELD >= %@ AND YOUR_DATE_FIELD =< %@", argumentArray: [startDate!, endDate!])

}

I've recently spent some time attempting to solve this same problem and add the following to the list of alternatives to prepare start and end dates (includes updated method for iOS 8 and above)...

NSDate *dateDay = nil;

NSDate *dateDayStart = nil;

NSDate *dateDayNext = nil;



dateDay = <<USER_INPUT>>;



dateDayStart = [[NSCalendar currentCalendar] startOfDayForDate:dateDay];



//  dateDayNext EITHER

dateDayNext = [dateDayStart dateByAddingTimeInterval:(24 * 60 * 60)];



//  dateDayNext OR

NSDateComponents *dateComponentDay = nil;

dateComponentDay = [[NSDateComponents alloc] init];

[dateComponentDay setDay:1];

dateDayNext = [[NSCalendar currentCalendar] dateByAddingComponents:dateComponentDay

                                                            toDate:dateDayStart

                                                           options:NSCalendarMatchNextTime];

...and the NSPredicate for the Core Data NSFetchRequest (as already shown above in other answers)...

[NSPredicate predicateWithFormat:@"(dateAttribute >= %@) AND (dateAttribute < %@)", dateDayStart, dateDayNext]]

For me this is worked.

NSCalendar *calendar = [NSCalendar currentCalendar];

    NSDateComponents *components = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit ) fromDate:[NSDate date]];

    //create a date with these components

    NSDate *startDate = [calendar dateFromComponents:components];

    [components setMonth:0];

    [components setDay:0]; //reset the other components

    [components setYear:0]; //reset the other components

    NSDate *endDate = [calendar dateByAddingComponents:components toDate:startDate options:0];



    startDate = [NSDate date];

    endDate = [startDate dateByAddingTimeInterval:-(7 * 24 * 60 * 60)];//change here



    NSString *startTimeStamp = [[NSNumber numberWithInt:floor([endDate timeIntervalSince1970])] stringValue];

    NSString *endTimeStamp = [[NSNumber numberWithInt:floor([startDate timeIntervalSince1970])] stringValue];





   NSPredicate *predicate = [NSPredicate predicateWithFormat:@"((paidDate1 >= %@) AND (paidDate1 < %@))",startTimeStamp,endTimeStamp];

    NSLog(@"predicate is %@",predicate);

    totalArr = [completeArray filteredArrayUsingPredicate:predicate];

    [self filterAndPopulateDataBasedonIndex];

    [self.tableviewObj reloadData];

    NSLog(@"result is %@",totalArr);

I have filtered array from current date to 7 days back. I mean I am getting one week data from current date. This should work.

Note: I am converting date which is coming with milli seconds by 1000, and comparing after. Let me know if you need any clarity.