Thread-topic: Thoroughly confused on date formatting
User-agent: Microsoft-Entourage/11.2.3.060209
On Thu, 28 Sep 2006 09:24:10 +0100, Mike Abdullah <email@hidden>
said:
>In my app, I want to have an NSTextField for formatting times only.
>I see that NSDateFormatter (the 10.4 version) has the ability to do
>this using the setTimeStyle: method
>
>I need to display hours and minutes only. I could just force the
>user to my chosen format, but I'd rather they have their own choice
>of 12/24 hour clock etc.
>
>I figured that the NSDateFormatterShortStyle constant would pull what
>I needed, but the docs say:
>
>"The format for these date and time styles is not exact because they
>depend on the locale, user preference settings, and the operating
>system version. Do not use these constants if you want an exact format."
>
>So, if I want to set a date formatter up to display hours and minutes
>only, where can I reliably pull this information from? Will I have
>to take the user's preference from NSUserDefaults and manually parse
>it?
Here is what I do:
NSDateFormatter *dateFormatter =
[[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[dateFormatter setDateStyle:NSDateFormatterShortStyle];
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
NSMutableString* f =
[NSMutableString stringWithString:[dateFormatter dateFormat]];
Aha, so now I have the user's preferences expressed as a mutable string in
ICU format. So now I mutate the string to combine the user's preferences
with my own (e.g. get rid of everything but hours and minutes, in your
case), and then:
[dateFormatter setDateFormat:f];
m.
--
matt neuburg, phd = email@hidden, <http://www.tidbits.com/matt/>
A fool + a tool + an autorelease pool = cool!
AppleScript: the Definitive Guide - Second Edition!
<http://www.amazon.com/gp/product/0596102119>
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