Re: UIDatePicker displays incorrect day in UIDatePickerDateAndTime mode for zones 12+ hours ahead of defaultZone
Re: UIDatePicker displays incorrect day in UIDatePickerDateAndTime mode for zones 12+ hours ahead of defaultZone
- Subject: Re: UIDatePicker displays incorrect day in UIDatePickerDateAndTime mode for zones 12+ hours ahead of defaultZone
- From: email@hidden
- Date: Fri, 14 Jan 2011 16:57:52 -0500
I'm not the original author of this thread, but I submitted a bug back in August 2010 about these issues. It was marked as a duplicate and I've never heard anything more. Perhaps I don't know how to properly follow duplicates. My bug # is 8320528.
Dave
On Jan 14, 2011, at 4:34 PM, Deborah Goldsmith wrote:
> Did you write a bug for this? What is the bug number?
>
> Thanks,
> Deborah Goldsmith
> Apple Inc.
>
> On Jan 10, 2011, at 10:12 AM, Steve Mykytyn wrote:
>
>> UIDatePicker (4.2.1) shows differing dates for the modes
>>
>> UIDatePickerDate (correct), and
>>
>> UIDatePickerDateAndTime (incorrect)
>>
>> when the timezone you assign to the UIDatePicker is
>>
>> - more than 12 hours ahead (east) of the systemTimeZone of the iPhone.
>>
>> For example,
>>
>> device system time zone = America/Los Angeles = GMT - 8
>>
>> Honolulu date: Dec 7, 1941 7:48am
>>
>> Tokyo date: Dec 8, 1941 3:18am
>>
>> UIDatePicker will show the Tokyo date for mode
>>
>> UIDatePickerDate (correct): Dec 8, 1941
>>
>> UIDatePickerDateAndTime: Dec 7, 1941
>>
>> In fact, UIDatePicker will show incorrect dates in this case for any time zone east of GMT + 4 (always one day before correct day)
>>
>>
>> A work-around in viewDidLoad is:
>>
>> self.datePicker.datePickerMode = UIDatePickerModeDateAndTime;
>>
>> self.datePicker.minuteInterval = 1;
>>
>> self.datePicker.timeZone = timeZone;
>>
>> [NSTimeZone setDefaultTimeZone:timeZone]; // *** add this line to force date picker to show correct date in all modes
>>
>> [self.datePicker setDate:tzDate animated:YES];
>>
>> and in viewWillDisappear add:
>>
>> [NSTimeZone resetSystemTimeZone];
>>
>> [NSTimeZone setDefaultTimeZone:[NSTimeZone systemTimeZone]];
>>
>> Not super happy about the work-around, but it should be fairly robust even if this bug is fixed in future.
>>
>> If anyone can shed some light on this behavior, please advise. No amount of fooling around with calendars, locales, etc. fixed this until i reset the default zone.
>>
>>
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