How to transform two NSDate objects into an ISO-8601 time interval duration?

Asked Mar 06 '14 at 16:42

Active Mar 06 '14 at 16:49

Viewed 169 times

Basically I want the opposite of this question: How to parse an ISO-8601 duration in Objective C? which asks for a transform from a ISO-8601 time interval duration to NSTimeInterval.

I want to go from two NSDate objects to a ISO-8601 time interval duration. Preferably I could specify the accuracy such as to the nearest year, month, or day etc. I was thinking I could strip the date components off each and create the duration that way but I was wondering if someone already made something that is battle tested and production ready.

edited May 23 '17 at 12:28

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asked Mar 06 '14 at 16:42

Steve Moser

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What do you need to know? You take the duration, apply modulo arithmetic to break it into the desired units, and format the result. – Hot Licks Mar 06 '14 at 17:44
@HotLicks What is the ISO-8601 defined days per month? 28,29,30,31? – Steve Moser Mar 06 '14 at 17:55
Close as I can tell, it's not defined. – Hot Licks Mar 06 '14 at 17:59

How to transform two NSDate objects into an ISO-8601 time interval duration?

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