Converting Date to milli seconds in ios

Question

hi am using following to convert date to string in objective C.

-(void)convertDateToJsonString:(NSString *)strDate
{


    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    [formatter setTimeZone:[NSTimeZone systemTimeZone]];
    [formatter setLocale:[NSLocale systemLocale]];
    [formatter setDateFormat:@"yyyy/MM/dd"];


    NSDate * date =[formatter dateFromString:strDate];

    long long milliseconds = (long long)([date timeIntervalSince1970] * 1000.0);

    NSLog(@"After conversion %lli",milliseconds);



}

its giving date but always getting time is 00:00:00 something not current time.How to get selected date with current time in milli second.

but its working for current date like below

 long long millisecs = (long long)([[NSDate date] timeIntervalSince1970] * 1000.0);

    NSLog(@"After conversion %lli",millisecs);

Am getting from date picker date and converting.

And also for getting exact time zone like +530 in ios is there any methods? i know [NSTimezone Systemzone] but its giving whole value like "Asia/kolkatta +..."

if the initial string date doesn't have any hours or minutes. How could `dateFromString` guess? — Larme, Dec 09 '13 at 15:14
so i have to get time also from string then can get milli second right? @Larme — Sugan S, Dec 09 '13 at 15:21
You don't show us how you display time, so anything we say would be a conjecture, other than to observe that if you only parse date and not time then you won't magically get time from somewhere. — Hot Licks, Dec 09 '13 at 17:00
"Am getting from date picker date and converting." If you're getting the source date from a date picker, why don't you just leave it as an NSDate, vs converting to string and back? — Hot Licks, Dec 09 '13 at 17:04
To get the timezone in the format you desire simply use "Z" in the date format string of the date formatter you use to convert the NSDate to a string date. — Hot Licks, Dec 09 '13 at 17:05

score 0 · Answer 1 · answered Dec 09 '13 at 15:58

0

The problem is that your strDate is not getting parsed by dateFromString:. The result is that your date will be nil and timeInternvalSince1970 will do some default processing on nil. You can confirm this by adding:

NSAssert (nil != date);

after your initialize date. The assertion will fail.

The solution is that you need a better formatter - one that is consistent with the format of the passed in strDate.

But, perhaps you have a more fundamental problem. The UIDatePicker date property returns an NSDate object directly. Where are you getting your strDate from?

answered Dec 09 '13 at 15:58

GoZoner

67,920
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hi @GoZoner am getting date is correct only the problem is time always 00:00:00+5:30 am getting.Thanks for your reply friend – Sugan S Dec 09 '13 at 16:51
Okay. Why are you using a `strDate` as an `NSString` instead of just getting an `NSDate` directly from your `NSDatePicker` using the `date` property? – GoZoner Dec 09 '13 at 19:30

score 0 · Answer 2 · answered Dec 09 '13 at 17:08

0

You have not added hours, minutes and seconds in NSDateFormatter like this

[formatter setDateFormat:@"yyyy/MM/dd HH:mm:ss ZZZ"];

answered Dec 09 '13 at 17:08

sanjaymathad

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Converting Date to milli seconds in ios

2 Answers2