How to increment one second by a NSDate object

Question

I have a NSString which have the format of @"2013-01-09 06:10:10 +0000" (I am getting it from server and it is not the current time). I want to increment it by one second continuously. I can use a timer for doing it, but how to increment the time by one second?

score 36 · Accepted Answer · answered Jan 09 '13 at 06:14

36

Try this,

NSDate *correctDate = [NSDate dateWithTimeInterval:1.0 sinceDate:yourDate];

You can get yourDate from string using NSDateFormatter.

answered Jan 09 '13 at 06:14

Anusha Kottiyal

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score 3 · Answer 2 · answered Apr 14 '17 at 16:18

Nowadays (2017) Apple recommends to use (NS)Calendar for all kinds of date math

Objective-C

NSDate *now = [NSDate date];
NSCalendar *currentCalendar = [NSCalendar currentCalendar];
NSDate *nowPlusOneSecond = [currentCalendar dateByAddingUnit:NSCalendarUnitSecond 
                                                       value:1 
                                                      toDate:now 
                                                     options:NSCalendarMatchNextTime];

Swift 3

let now = Date()
let currentCalendar = Calendar.current
let nowPlusOneSecond = currentCalendar.date(byAdding: .second, value: 1, to: now)!

score 2 · Answer 3 · answered Jan 09 '13 at 06:25

2

add 1 second in your date like bellow..

NSDate *mydate = [NSDate date];
NSTimeInterval secondsInEightHours = 60; // you can add hours and minuts with multiply the numbers with this second..
NSDate *dateEightHoursAhead = [mydate dateByAddingTimeInterval:secondsInEightHours];

answered Jan 09 '13 at 06:25

Paras Joshi

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11
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Downvote for copying code from [this question](http://stackoverflow.com/a/1654439/328360) but not fixing it up (not fixing variable names, and the code doesn't actually add one second, it adds 60 seconds) – Marko May 07 '14 at 23:43
@Marko i just post my code which i used before in my apps and i don't know at that time i get solution from which answer so i post my code not copied from any other's answer. i don't know about that but this is code which i posted with my code and logic only. – Paras Joshi May 08 '14 at 06:59

score 1 · Answer 4 · answered Jan 09 '13 at 06:37

Say your date string is in var called serverString. You can get a date this way...

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd hh:mm:ss z"];
NSDate *date = [df dateFromString:serverString];

And increment it this way:

date = [date dateByAddingTimeInterval:1.0];

score 0 · Answer 5 · answered Apr 14 '17 at 15:59

0

SWIFT 3.x Solution

// Just an example to present second level date/time calculation
let time = NSDate()
let interval:Double = 5.0
let timeFiveSecondLater = time.addingTimeInterval(interval)

answered Apr 14 '17 at 15:59

Trevor

1,051
12
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How to increment one second by a NSDate object

5 Answers5