将 ISO 8601 转换为 NSDate [英] Convert ISO 8601 to NSDate

问题描述

我有一个来自服务器的时间戳，如下所示:

I have a timestamp coming from server that looks like this:

2013-04-18T08:49:58.157+0000

我已经尝试删除冒号，我已经尝试了所有这些:

I've tried removing the colons, I've tried all of these:

将 ISO 8601 时间戳转换为 NSDate:如何处理 UTC 时间偏移?

为什么 NSDateFormatter 不能从 ISO 8601 解析日期格式

这是我现在的位置:

+ (NSDate *)dateUsingStringFromAPI:(NSString *)dateString {


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

    //@"yyyy-MM-dd'T'HH:mm:ss'Z'" - doesn't work
    //@"yyyy-MM-dd'T'HH:mm:ssZZZ" - doesn't work
    //@"yyyy-MM-dd'T'HH:mm:sss" - doesn't work 

    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss'Z'"];
    [dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]];

    // NSDateFormatter does not like ISO 8601 so strip the milliseconds and timezone
    dateString = [dateString substringWithRange:NSMakeRange(0, [dateString length]-5)];

    return [dateFormatter dateFromString:dateString];
}

我最大的问题之一是，我上面的日期格式真的是 ISO 8601 吗?我从人们那里看到的所有示例，每个示例的格式都略有不同.有些有 ...157-0000，有些最后什么都没有.

One of my biggest questions is, is the date format I have above really ISO 8601? All the examples I have seen from people the formats of each are slightly different. Some have ...157-0000, others don't have anything at the end.

推荐答案

这对我有用:

NSString *dateString = @"2013-04-18T08:49:58.157+0000";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSZ"];
// Always use this locale when parsing fixed format date strings
NSLocale *posix = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
[formatter setLocale:posix];
NSDate *date = [formatter dateFromString:dateString];
NSLog(@"date = %@", date);

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