ios - How to convert UTC date string to local time (systemTimeZone)

Question

Input String: June 14, 2012 - 01:00:00 UTC

Output Local String: Jun 13, 2012 - 21:00:00 EDT

I like to get the offset from

NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];
NSLog(@"Time Zone: %@", destinationTimeZone.abbreviation);

Any suggestion ?

Answer 1

This should do what you need:

NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
fmt.dateFormat = @"LLL d, yyyy - HH:mm:ss zzz";
NSDate *utc = [fmt dateFromString:@"June 14, 2012 - 01:00:00 UTC"];
fmt.timeZone = [NSTimeZone systemTimeZone];
NSString *local = [fmt stringFromDate:utc];
NSLog(@"%@", local);

Note that your example is incorrect: when it's 1 AM on June-14th in UTC, it's still June-13th in EST, 8 PM standard or 9 PM daylight savings time. On my system this program prints

Jun 13, 2012 - 21:00:00 EDT