// 时间序列化

NSString *str = @"20130322152832";

NSDateFormatter *formater = [[NSDateFormatter alloc] init];

//系统时区

[formater setDateFormat:@"yyyyMMddHHmmss"];

NSDate *date = [formater dateFromString:str];

//时区转换取得时区

NSTimeZone *timeZone =  [NSTimeZone systemTimeZone];

NSInteger interval = [timeZone secondsFromGMTForDate:date];

// 这里千万不要忘记赋值,否则悲剧

date = [date dateByAddingTimeInterval:interval];

NSLog(@"%@",date);