NSDateFormatter返回错误的年份 [英] NSDateFormatter returning wrong year

问题描述

我正在使用一种非常基本的方法将日期转换为字符串.

I am using a pretty basic method to turn dates into strings.

+(NSString*)stringForDate:(NSDate*)date {
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"ddMMYYYY"];
    NSLog(@"%@",date);
    NSLog(@"%@",[dateFormat stringFromDate:date]);
    return [dateFormat stringFromDate:date];
}

但是其中一些人来了错误的岁月.这是日志的示例.

But some of them are coming back with the wrong years. Here's a sample of the log.

2014-05-25 00:26:46.050 App Name[1868:60b] 2013-12-26 16:00:00 +0000
2014-05-25 00:26:46.051 App Name[1868:60b] 27122013
2014-05-25 00:26:46.051 App Name[1868:60b] 2013-12-27 16:00:00 +0000
2014-05-25 00:26:46.051 App Name[1868:60b] 28122013
2014-05-25 00:26:46.051 App Name[1868:60b] 2013-12-28 16:00:00 +0000
2014-05-25 00:26:46.052 App Name[1868:60b] 29122014
2014-05-25 00:26:46.052 App Name[1868:60b] 2013-12-29 16:00:00 +0000
2014-05-25 00:26:46.054 App Name[1868:60b] 30122014

忽略这一事实，即由于时区的原因，几天似乎晚了一天.但是，输入的所有日期都是2013年，但是有些字符串会在2014年返回.

Ignore the fact that the days appear to be a day later - that's expected, due to time zone. However, all the dates being fed in are 2013, but some of the strings are coming back with 2014.

任何帮助表示赞赏-我正在努力！

Any help appreciated - it's doing my head in!

推荐答案

问题是YYYY和yyyy是两个完全不同的事物.您正在使用YYYY，正如 docs 告诉您的那样，不一定与日历年相同.

The thing is that YYYY and yyyy are two quite different things. You are using YYYY, which, as the docs tell you, is not necessarily the same as the calendar year.

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