我在解析日期字符串时遇到了一个奇怪的问题。我有一个日期格式化程序，格式为：
yyyy-MM-dd HH:mm:ss.SSSSSSZZ
和日期字符串：
2012-11-09 10:47:01.999804+01
dateFromString 方法返回 nil，但是当我将日期字符串更改为 ie 时：
2012-11-09 10:47:01.989804+01
它有效......有谁知道为什么微秒值有这样的限制，我怎样才能正确解析上面的日期？
我可以用正则表达式解析它并剪切整个 SSSSSS 部分，但通常有时我需要比较日期，这样它们就不会匹配，这会导致更多问题。
I had no end of niggly issues doing this, finally got it to work but stripped the point seconds off and used the format as follows
#define DATEFORMATSTRINGTIMEZONE @"yyyy-MM-dd HH:mm ZZZ"
a bit like you say. I have to admit a bit more into the project I realized this was a very difficult method of sharing dates and instead adopted epoch time which has saved all headaches I was having regarding timezones... I'd highly recommend it if you have the luxury of changing the incoming data format.
Whilst I'm not sure why yours doesn't parse, I would question the ZZ instead of the ZZZ at the end given you have +01 not +1?
我终于解决了这个问题。
我正在修改日期格式和日期字符串以删除微秒，以便我可以正确解析日期。然后我只添加从原始日期字符串解析的微秒。