我在 iPhone 上的日期字符串中使用的毫秒格式字符串是什么？

我被要求以包含毫秒的格式解析字符串。我用什么格式的字符串来获得正确的日期值？

例如，假设我有一个值如下的字符串: “2011-06-23T13:13:00.000”

在下面的代码中传递什么格式字符串给我的 NSDateFormatter？

NSString *dateValue = @"2011-06-23T13:13:00.000";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
NSString *formatString = @"yyyy-MM-dd'T'HH:mm:ss.???";
[formatter setDateFormat:formatString];
NSDate *date = [formatter dateFromString:dateValue];

在上面的代码中，我使用什么来代替？

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use SSS for three decimal places of a second

"yyyy-MM-dd'T'HH:mm:ss.SSS"

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最佳答案

It's SSS, per the Unicode Locale Data Markup Language spec.

"yyyy-MM-dd'T'HH:mm:ss.SSS"

More generally, use any number of upper-case S characters to get that many decimal places in the fractions-of-a-second component. (So ss.S will show the time to the nearest tenth of a second, for example.)

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The Date Format Patterns guide suggests that "S" is the format specifier for fractions of seconds.

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You need to pass same number of 'S' at the end for example My Date was '2015-11-17T03:36:45.041503Z' the i used 'yyyy-MM-dd'T'HH:mm:ss.SSSSSSz' formatter, I mean see the number of 'S' is 6 as 6 digit coming in date.