JSON date string conversion issue in iOs - ios

Question

I am getting some UTC date strings from WCF Rest service and here is the format:
/Date(1354851639500+0530)/
I used the following code to convert the date:
//jsonDateString = 1354851639500+0530
NSInteger offset = [[NSTimeZone defaultTimeZone] secondsFromGMT]; //get number of seconds to add or subtract according to the client default time zone
NSTimeInterval unixTime = [[jsonDateString substringWithRange:NSMakeRange(0, 13)] doubleValue] / 1000; //WCF will send 13 digit-long value for the time interval since 1970 (millisecond precision) whereas iOS works with 10 digit-long values (second precision), hence the divide by 1000
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[dateFormatter setTimeZone:timeZone];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss a ZZZZ"];
NSString *stringFromDAte = [dateFormatter stringFromDate:[[NSDate dateWithTimeIntervalSince1970:unixTime] dateByAddingTimeInterval:offset]];
NSLog(#"Server GMT: %#", stringFromDAte);
NSDate *currentDadte = [dateFormatter dateFromString:stringFromDAte];
NSTimeInterval interval = [currentDadte timeIntervalSinceDate:[NSDate date]];
return [self dailyLanguage:interval];
But when I convert the time is not correct. I need to get the UTC time of the receiving time. But I am getting the time value without the offset value.
For example: if josnDate = 1354851639500+0530,
i am getting, 2012-12-07 03:40:39 AM GMT, but i should get 2012-12-07 09:10:39 (approx).
How can I do this? Please help.

Answer 1

Try this Code
- (NSDate *)deserializeJsonDateString: (NSString *)jsonDateString
{
NSInteger offset = [[NSTimeZone defaultTimeZone] secondsFromGMT]; //get number of seconds to add or subtract according to the client default time zone
NSInteger startPosition = [jsonDateString rangeOfString:#"("].location + 1; //start of the date value
NSTimeInterval unixTime = [[jsonDateString substringWithRange:NSMakeRange(startPosition, 13)] doubleValue] / 1000; //WCF will send 13 digit-long value for the time interval since 1970 (millisecond precision) whereas iOS works with 10 digit-long values (second precision), hence the divide by 1000
[[NSDate dateWithTimeIntervalSince1970:unixTime] dateByAddingTimeInterval:offset];
return date;
}
For more detail answer follow this link
http://goo.gl/lE6ut

Answer 2

You can try this
NSString *jsonDateString = [SingleResponseObject objectForKey:#"datetime"];;
NSInteger offset = [[NSTimeZone defaultTimeZone] secondsFromGMT];
NSTimeInterval unixTime = [[jsonDateString substringWithRange:NSMakeRange(0, 13)] doubleValue] / 1000;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[dateFormatter setTimeZone:timeZone];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss a ZZZZ"];
NSString *stringFromDAte = [dateFormatter stringFromDate:[[NSDate dateWithTimeIntervalSince1970:unixTime] dateByAddingTimeInterval:offset]];
cell.date.text = stringFromDAte;