CODEWITHSUNDEEP
iosobjective-ctimezone
z22
z22

Reputation: 10083

iOS: convert UTC timezone to device local timezone

I am trying to convert the following timezone to device local timezone:

2013-08-03T05:38:39.590Z

Please let me know how to convert it to local timezone.

How do I do it?

Upvotes: 5

Views: 10067

Answers (2)

Chris Schiffhauer
Chris Schiffhauer

Reputation: 17290

Time zones can be applied to NSDateFormatter, from which you can generate NSDate variables differentiated by the time difference.

NSString* input = @"2013-08-03T05:38:39.590Z";
NSString* format = @"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";

// Set up an NSDateFormatter for UTC time zone
NSDateFormatter* formatterUtc = [[NSDateFormatter alloc] init];
[formatterUtc setDateFormat:format];
[formatterUtc setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];

// Cast the input string to NSDate
NSDate* utcDate = [formatterUtc dateFromString:input];

// Set up an NSDateFormatter for the device's local time zone
NSDateFormatter* formatterLocal = [[NSDateFormatter alloc] init];
[formatterLocal setDateFormat:format];
[formatterLocal setTimeZone:[NSTimeZone localTimeZone]];

// Create local NSDate with time zone difference
NSDate* localDate = [formatterUtc dateFromString:[formatterLocal stringFromDate:utcDate]];

NSLog(@"utc:   %@", utcDate);
NSLog(@"local: %@", localDate);

[formatterUtc release];
[formatterLocal release];

Upvotes: 11

iSpark
iSpark

Reputation: 952

Try like this:

   NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
   [dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
   [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"];
   NSDate* utcTime = [dateFormatter dateFromString:@"2013-08-03T05:38:39.590Z"];
   NSLog(@"UTC time: %@", utcTime);

   [dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
   [dateFormatter setDateFormat:@"M/d/yy 'at' h:mma"];
   NSString* localTime = [dateFormatter stringFromDate:utcTime];
   NSLog(@"localTime:%@", localTime);

Hope it helps you....

Upvotes: 2

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