Convert UNIX Timestamp to NSDate and to user's local timezone

date.c

NSDate *dateTraded = [NSDate dateWithTimeIntervalSince1970:1408636621];
    
NSDateFormatter *_formatter=[[NSDateFormatter alloc]init];
[_formatter setLocale:[NSLocale currentLocale]];
[_formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *_date=[_formatter stringFromDate:dateTraded];
    
NSLog(@"Final time: %@", _date);