Question

I have the following code.

NSDateFormatter *df = ...;
[df setTimeZone:[NSTimeZone defaultTimeZone]];
[df setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSZZZ"];
NSDate * date = [df dateFromString:date_string]; //here is the problem

In 24-hour mode everything is ok. When 12-hour mode is set on device, stringFromDate returns null.
Format of date_string is the same all the time, date format too. Why does it happen?

Answer 1

Try to set the locale in this way :

NSLocale *twelveHourLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
df.locale = twelveHourLocale;

To force instead to 24 hour, you can use :

NSLocale *twentyFour = [[NSLocale alloc] initWithLocaleIdentifier:@"en_GB"];