When you're generating/parsing a date format that's supposed to be
stable like this, you should control the locale/calendar used by the
formatter instead of letting the user settings control it.
For example, your data can be entirely off when the user's calendar is
not Gregorian.
Instead, you should specify the system locale, [NSLocale
systemLocale], and the gregorian calendar, [[NSCalendar alloc]
initWithCalendarIdentifier:@"gregorian"], explicitly.
Aki
On 2009/07/18, at 13:03, James Gillespie wrote:
Hi All,
Thanks in advance for any help on this issue. I have a file that
uses the following format for date and times:
(4 digit year)-(2 digit month)-(2 digit day)T(2 digit hour, 0-23):(2
digit minute):(2 digit seconds)-(4 digit offset from GMT)
Example: 2009-07-17T17:12:20-0700
I am using an NSDateFormatter with a custom date format to read
these dates.
formatter = [[NSDateFormatter alloc] init];
[formatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZ"];
On the Mac this works great for any combination of Region setting
and 24hr/AM,PM settings. On the iPhone (both iPhone OS 2.2.1 and
3.0) this does not work if the Region setting is set to something
that defaults to 24hr time (like UK, France, and Thai) but the time
display setting is set by the user to AM/PM. For example: on the
iPhone if in "Settings" you set the region to UK and turn 24-Hour
Time off. When the phone is configured like this the above code
wants to read and write dates with the following format.
(4 digit year)-(2 digit month)-(2 digit day)T(2 digit hour, 0-23):(2
digit minute):(2 digit seconds) (AM/PM)-(4 digit offset from GMT)
Example: 2009-07-17T17:12:20 PM-0700
This is not the behavior I would have expected. Am I configuring
NSDateFormatter correctly? Is this a bug I should file in Radar?
Again any help is greatly appreciated. We have an app in the App
Store with this issue and it is causing some customers issues.
Thanks,
James
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