These days m working on iPhone development and came across an interesting problem of converting GMT time into local time. After some research, I found this interesting function achieve it:
-(NSString *)convertGMTDateFromLocalDate:(NSString *)gmtDateStr
{
NSDateFormatter* formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@”yyyy-MM-dd HH:mm”];
NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:@”GMT”];
[formatter setTimeZone:gmt];
NSDate *localDate = [formatter dateFromString:gmtDate]; // get the date
NSTimeInterval timeZoneOffset = [[NSTimeZone systemTimeZone] secondsFromGMT]; // You could also use the systemTimeZone method
NSTimeInterval gmtTimeInterval = [localDate timeIntervalSinceReferenceDate] – timeZoneOffset;
NSDate *gmtCurrentDate = [NSDate dateWithTimeIntervalSinceReferenceDate:gmtTimeInterval];
return [formatter stringFromDate:gmtCurrentDate];
}