Re: Determining user's clock preference on iOS
Re: Determining user's clock preference on iOS
- Subject: Re: Determining user's clock preference on iOS
- From: Dave DeLong <email@hidden>
- Date: Thu, 23 Feb 2012 11:37:26 -0800
On Feb 23, 2012, at 8:21 AM, Kyle Sluder wrote:
> On Feb 22, 2012, at 10:50 PM, Rick Mann <email@hidden> wrote:
>
>> I have a need to format times as either
>>
>> 24:mm
>>
>> or
>>
>> 12:mm
>> am
>>
>> That is, if the user prefers a 24-hour clock, I want it to appear on a single line. If the user prefers a 12-hour clock, I want the AM/PM designator to be rendered underneath the time (in smaller type).
>>
>> Unfortunately, there's no format specifier for the hours of the day that indicates "use the user's preferred format."
>
> What happens if you give +[NSDateFormatter dateFormatFromTemplate:options:locale:] a template that contains "h:m:s a"? Does it rewrite it to "H:m:s" if the current locale uses 24-hour time?
If you're going to go with this route, you'd need to use "j:m:s". According to The Spec (http://unicode.org/reports/tr35/#Date_Format_Patterns), "use of 'j' in a skeleton passed to an API is the only way to have a skeleton request a locale's preferred time cycle type (12-hour or 24-hour)."
Cheers,
Dave
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