Re: NSDatePicker 24 hour clock
Re: NSDatePicker 24 hour clock
- Subject: Re: NSDatePicker 24 hour clock
- From: Daniel Wambold <email@hidden>
- Date: Sat, 9 Jan 2010 08:08:20 -0500
>
> On Jan 8, 2010, at 3:12 PM, Daniel Wambold wrote:
>
>> Hello. I have an NSDatePicker (NSTextFieldAndStepperDatePickerStyle) and I need it to display time in a 24-hour time mode. After reading Apple's docs and searching the Web, I can't seem to find a way to make this happen. I have attached an NSDateFormatter in IB and specified 24-hour time (HH:MM), but the program reverts back to a 12-hour clock. I changed my System Preferences to a 24 hour clock, but the NSDatePicker refuses to change. I tried a programmatic formatter:
>>
>> NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
>> [dateFormatter setDateFormat:@"HH:mm"];
>> [myDatePicker setFormatter:dateFormatter];
>> (Also tried [[myDatePicker cell] setFormatter:dateFormatter];)
>>
>> In desperation, I set a loop trying every NSDatePickerElementFlags from 0 to 513. Have I missed something, or is a 24-hour clock not allowed? The program is for use in a location where 24-hour time is mandatory. Thanks for any insight you might have.
>>
> This works for me. I always want UTC time zone and a 24 hour clock,
>
> NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
> [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
> [dateFormatter setDateFormat:@"yyyy/MM/dd' 'HH:mm:ss' UTC' "];
> mystring = [mystring stringByAppendingString:[dateFormatter stringFromDate:date]];
>
> Where date is an NSDate*.
>
> The capital HH should give you 24 hours time, as I understand it. Is it possible that "[myDatePicker cell]" is failing to see your dateFormatter and is using some default instead?
>
>
>
> david
David-
Thanks for your response. It looks like you're formatting an NSString with the date. That's fine, but I want the NSDatePicker itself to show 24 hour time. In other words, the UI element that is the date picker should show, next to its stepper, a 24 hour time, rather than an AM/PM time. That was why I tried telling both the NSDatePicker and the NSDatePickerCell to adopt the NSDateFormatter. If you have achieved this UI setup, I misunderstood your response, and would appreciate it if you would clarify how you formatted the DatePicker widget itself.
Thanks!
-Dan_______________________________________________
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