NSDateFormatter to parse ISO8601 with and without

问题:

This question already has answers here:

How to parse ISO 8601 using NSDateFormatter with optional milliseconds part (3 answers)

Closed 6 years ago.

Is it possible to have a NSDateFormatter parse both an ISO8601 date with and without milliseconds.

I have the following 2 date formats being returned by an API and sometimes they have milliseconds included and sometimes not.

For example I might have 2013-07-23T13:45:02Z and 2013-07-23T13:45:02.677Z. For the former setting the dateFormat property to @"yyyyMMdd'T'HHmmss'Z'" works fine.

Is there a format I can use to parse the later, optionally parsing the milliseconds if they exist?

回答1:

For "2013-07-23T13:45:02Z"
Use: "yyyy-MM-dd'T'HH:mm:ssZ"

For "2013-07-23T13:45:02.677Z"
Use: "yyyy-MM-dd'T'HH:mm:ss.SSSZ"

Check the date format string to see which to use or try one and if it fails try the other.

See: ICU Formatting Dates and Times