Convert date to timestamp in iOS

Question

How do you convert any given date to milliseconds? For example, 2014-01-23 to timestamp conversion.

NSDate *date = [dateFormatter dateFromString:@"2014-01-23"];
NSLog(@"date=%@",date);
NSTimeInterval interval  = [date timeIntervalSince1970];
NSLog(@"interval=%f",interval);
NSDate *methodStart = [NSDate dateWithTimeIntervalSince1970:interval];
[dateFormatter setDateFormat:@"yyyy/mm/dd "];
NSLog(@"result: %@", [dateFormatter stringFromDate:methodStart]);

Output result: 1970/30/01

score 22 · Answer 1 · edited Jun 20 '20 at 09:12

22

Swift

Convert the current date/time to a timestamp:

// current date and time
let someDate = Date()

// time interval since 1970
let myTimeStamp = someDate.timeIntervalSince1970

See also

edited Jun 20 '20 at 09:12

Community

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answered Jan 12 '17 at 02:01

Suragch

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KudoCC · Accepted Answer · 2014-01-15T06:51:17.360

6

Have it a try. "mm" stands for minute while "MM" stands for month.

NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init] ;
[dateFormatter setDateFormat:@"yyyy-MM-dd"] ;
NSDate *date = [dateFormatter dateFromString:@"2014-01-23"] ;
NSLog(@"date=%@",date) ;
NSTimeInterval interval  = [date timeIntervalSince1970] ;
NSLog(@"interval=%f",interval) ;
NSDate *methodStart = [NSDate dateWithTimeIntervalSince1970:interval] ;
[dateFormatter setDateFormat:@"yyyy/MM/dd "] ;
NSLog(@"result: %@", [dateFormatter stringFromDate:methodStart]) ;

edited Jan 15 '14 at 06:51

answered Jan 15 '14 at 06:44

KudoCC

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hey i'm struggling with the time like i have a particular date and a time for example 1-january-2018 9:00 am how to get the timestamp of the particular date with particular time... – tryKuldeepTanwar Aug 01 '17 at 02:41

score 0 · Answer 3 · answered Jan 15 '14 at 06:39

0

NSTimeinterval is really a double, being seconds since a particular date (in your case, the start of 1970)

answered Jan 15 '14 at 06:39

Alex Brown

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result should be 2014-01-23,why 1970/30/01 – user2799156 Jan 15 '14 at 06:42
I assume your initial dateFormatter is incorrectly configured. – Alex Brown Jan 15 '14 at 06:45

score 0 · Answer 4 · edited Jan 05 '17 at 14:38

0

[date1 timeIntervalSinceDate:date2] will return seconds from two NSDate objects.

double seconds = [date1 timeIntervalSinceDate:date2];
double milliSecondsPartOfCurrentSecond = seconds - [seconds intValue];

milliSecondsPartOfCurrentSecond

edited Jan 05 '17 at 14:38

Pushkraj P. Lanjekar

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answered Jan 15 '14 at 06:53

Zeeshan

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score 0 · Answer 5 · answered Jul 14 '14 at 13:04

NOTE :- UNIX Timestamp format contains 13 Digits so we need a 1000 multiplication with the result. And the timestamp must be UTC ZONE not our local Time Zone.

- (void)GetCurrentTimeStamp
    {
        NSDateFormatter *objDateformat = [[NSDateFormatter alloc] init];
        [objDateformat setDateFormat:@"yyyy-MM-dd"];
        NSString    *strUTCTime = [self GetUTCDateTimeFromLocalTime:@"2014-01-23"];
        NSDate *objUTCDate  = [objDateformat dateFromString:strUTCTime];
        long long milliseconds = (long long)([objUTCDate timeIntervalSince1970] * 1000.0);
        NSLog(@"Local Time = %@---- UTC = %@ ----- TimeSatmp = %ld  ---- TimeStamp = %lld",strTime,strUTCTime,unixTime,milliseconds);
    }

 - (NSString *) GetUTCDateTimeFromLocalTime:(NSString *)IN_strLocalTime
    {
        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"yyyy-MM-dd"];
        NSDate  *objDate    = [dateFormatter dateFromString:IN_strLocalTime];
        [dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
        NSString *strDateTime   = [dateFormatter stringFromDate:objDate];
        return strDateTime;
    }

Convert date to timestamp in iOS

5 Answers5

Swift

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