CODEWITHSUNDEEP
iosobjective-cnsdateformatter
ShevO27
ShevO27

Reputation: 906

IOS ObjC NSDateFormatter stringFromDate returns nil

I have a function that takes 2 parameters, a date string in format @"2022-09-19T18:00:00.000Z", and a pattern (date format): @"MMM d".
The problem is that the date is always nil, therefore the formattedDate is nil as well, however, if i change the region in settings in my phone for US for example, the function works correctly.
Original region is Ukraine, but this should work in any region obviously.

{
  NSDateFormatter * df = [NSDateFormatter new];
  [df setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"];
  [df setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];

  NSDate * date = [df dateFromString: dateStr];
  [df setLocalizedDateFormatFromTemplate: pattern];
  [df setTimeZone:[NSTimeZone localTimeZone]];

  NSString * formattedDate = [df stringFromDate: date];

  if(formattedDate != nil){
    resolve(formattedDate);
  } else {
    resolve(@"");
  }
}

I've tried answers from there, but with no luck unfortunately.

Upvotes: 0

Views: 60

Answers (1)

sbooth
sbooth

Reputation: 16976

For fixed format date representations it's generally necessary to set the locale to POSIX:

RFC3339DateFormatter = [[NSDateFormatter alloc] init];
RFC3339DateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
RFC3339DateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ssZZZZZ";
RFC3339DateFormatter.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];

If you're targeting macOS 10.12 or later you could also consider using NSISO8601DateFormatter.

Upvotes: 1

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