Adding days to NSDate

Question

I want add days to a date, I got many codes for this but none of them are working for me below shown is my code,please somebody help me to fix this issue

int         


        

Answer 1

in Swift 2.1.X and xcode 7.1 OSX 10.10.5 ,you can add any number of days forward and backwards using function

func addDaystoGivenDate(baseDate:NSDate,NumberOfDaysToAdd:Int)->NSDate
{
    let dateComponents = NSDateComponents()
    let CurrentCalendar = NSCalendar.currentCalendar()
    let CalendarOption = NSCalendarOptions()

    dateComponents.day = NumberOfDaysToAdd

    let newDate = CurrentCalendar.dateByAddingComponents(dateComponents, toDate: baseDate, options: CalendarOption)
    return newDate!
}

function call for incrementing current date by 9 days

var newDate = addDaystoGivenDate(NSDate(), NumberOfDaysToAdd: 9)
print(newDate)

function call for decrement current date by 80 days

newDate = addDaystoGivenDate(NSDate(), NumberOfDaysToAdd: -80)
print(newDate)

Answer 2

    NSDate *now = [NSDate date];
    int daysToAdd = 1;
    NSDate *newDate = [now dateByAddingTimeInterval:60*60*24*daysToAdd];

Answer 3

With iOS 8 and 10.9, you can now actually do this a lot easier. You can add any number of any calendar unit to a date. I declared a really small category method on NSDate to make this even faster (since I just needed adding days throughout my app). Code below.

-(NSDate *)addDaysToDate:(NSNumber *)numOfDaysToAdd {
    NSDate *newDate = [[NSCalendar currentCalendar] dateByAddingUnit:NSCalendarUnitDay value:numOfDaysToAdd.integerValue toDate:self options:nil];
    return newDate;
}

Key things: NSCalendarUnitDay is what I used to let it know I want to add days. You can change this to the other enum values like months or years.

Since it's a category on NSDate, I'm adding the value to self. If you don't want to declare a category, you'd just take a date in the method parameters, like:

-(NSDate *)addDays:(NSNumber *)numOfDaysToAdd toDate:(NSDate *)originalDate {
    NSDate *newDate = [[NSCalendar currentCalendar] dateByAddingUnit:NSCalendarUnitDay value:numOfDaysToAdd.integerValue toDate:originalDate options:nil];

    return newDate;
}

I use a NSNumber, but you can easily just use an NSInteger.

Finally, in Swift:

func addDaysToDate(daysToAdd: Int, originalDate: NSDate) -> NSDate? {
        let newDate = NSCalendar.currentCalendar().dateByAddingUnit(NSCalendarUnit.DayCalendarUnit, value: daysToAdd, toDate: originalDate, options: nil)
        return newDate
    }

If you want to get rid of the NSDate? and feel comfortable with unwrapping a possible nil (the date adding might fail), you can just return newDate! and get rid of the ? mark.

Answer 4

In Swift 2, use extension to extend NSDate:

extension NSDate {

    func addDays(days:Int) -> NSDate{
        let newDate = NSCalendar.currentCalendar().dateByAddingUnit(
            .Day,
            value: days,
            toDate: self,
            options: NSCalendarOptions(rawValue: 0))

        return newDate!
    }
}

Answer 5

I suggest you review this article for a cleaner solution.

Answer 6

// Initialize stringified date presentation
NSString *myStringDate = @"2011-11-17";

// How much day to add
int addDaysCount = 30;

// Creating and configuring date formatter instance
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];

// Retrieve NSDate instance from stringified date presentation
NSDate *dateFromString = [dateFormatter dateFromString:myStringDate];

// Create and initialize date component instance
NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
[dateComponents setDay:addDaysCount];

// Retrieve date with increased days count
NSDate *newDate = [[NSCalendar currentCalendar] 
                              dateByAddingComponents:dateComponents 
                                              toDate:dateFromString options:0];

NSLog(@"Original date: %@", [dateFormatter stringFromDate:dateFromString]);
NSLog(@"New date: %@", [dateFormatter stringFromDate:newDate]);

// Clean up
[dateComponents release], dateComponents = nil;
[dateFormatter release], dateFormatter = nil;

Output:

Original date: 2011-11-17
New date: 2011-12-17