ios - Getting back a date from a string

Question

im dealing with dates, and i'm having problems getting my date back from a string, i simplified my problem here:

let date = NSDate()
let formatter = NSDateFormatter()
formatter.dateFormat = "dd-MM-YYYY"
formatter.stringFromDate(date)
formatter.dateFromString(formatter.stringFromDate(date))

And the output is: "25-05-2015" (Which is fine) "Dec 21, 2014, 12:00 AM" (???)

Answer 1

The problem there is that Y is for weekOfYear. You have to use "dd-MM-yyyy". Btw don't forget to set your date formatter locale to "en_US_POSIX" .

If you're working with fixed-format dates, you should first set the locale of the date formatter to something appropriate for your fixed format. In most cases the best locale to choose is "en_US_POSIX", a locale that's specifically designed to yield US English results regardless of both user and system preferences. "en_US_POSIX" is also invariant in time (if the US, at some point in the future, changes the way it formats dates, "en_US" will change to reflect the new behaviour, but "en_US_POSIX" will not), and between machines ("en_US_POSIX" works the same on iOS as it does on OS X, and as it it does on other platforms).