UIDatePicker locale does nothing?

I'm creating a UIDatePicker programmatically, and setting its locale with the following code:

datePicker.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"es_ES"] autorelease];

The datepicker still appears in English (or whatever language I've set the phone to). Anyone have any idea why this does nothing, o开发者_StackOverflow中文版r how to fix it?

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As answered here Can I localize a UIDatePicker?, the picker display depends on country settings, not on language settings.

In your example you are changing the language locale only.

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Try changing the locale of the UIDatePicker's calendar as well:

NSLocale *locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"es_ES"] autorelease];
datePicker.locale = locale; 
datePicker.calendar = [locale objectForKey:NSLocaleCalendar];