Re: Cocoa-dev Digest, Vol 11, Issue 267
Re: Cocoa-dev Digest, Vol 11, Issue 267
- Subject: Re: Cocoa-dev Digest, Vol 11, Issue 267
- From: Jim McGowan <email@hidden>
- Date: Wed, 14 May 2014 22:23:36 +0800
On 14 May, 2014, at 10:08:39 pm HKT, Jens Alfke <email@hidden>
>
> On May 14, 2014, at 6:41 AM, Jonathan Mitchell <email@hidden> wrote:
>
>> Is there a way to obtain an NSDate object from a casually entered user string, say: 1 1 2015 or 25 jul 15?
>
> There’s no easy way. You can create a whole bunch of format strings for every exact format you expect, and then try to parse the input using each one in turn (tip: the order you test the formats in is important); or you can write a custom parser (hopefully using a parser generator like ANTLR.) Or you could search around to see if there are any open-source libraries that do this … I just checked the About box of Fantastical (which has a really good date parser) but didn’t see anything relevant. Good luck!
>
> —Jens
There is NSDate +dateWithNaturalLanguageString:, but milage may vary, as the docs say:
“It may give unexpected results, and its use is strongly discouraged”
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSDate_Class/Reference/Reference.html#//apple_ref/occ/clm/NSDate/dateWithNaturalLanguageString:
Jim
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