ios - RestKit 与 NSDateFormatter

Question

这是我第一次使用 RestKit，我在日期格式方面遇到了麻烦。我给它一个日期:2014-07-18T09:00:54

我已经创建了一个 NSDateFormatter 并尝试使用 NSLog 对其进行测试:

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"];
dateFormatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"UTC"];
NSLog(@"%@",     [dateFormatter dateFromString:@"2014-07-18T09:00:54"]);

然后打印出以下正确答案:2014-07-18 09:00:54 +0000。我看过 https://github.com/RestKit/RestKit/wiki/Object-Mapping#transforming-date-and-time-representations ，并尝试在没有锁定的情况下添加这样的格式化程序。

[[RKValueTransformer defaultValueTransformer] insertValueTransformer:dateFormatter atIndex:0];

它打印出:2014-07-18 11:00:54 CEST，所以我猜它使用了默认格式化程序。谁能帮我解释一下这个问题？

Answer 1

下面的代码解决了我的问题

/
*
* Before we set up mappings, add a String <--> Date transformer that interprets string dates
*  lacking timezone info to be in the user's local time zone
*/
[RKObjectMapping class];    // Message the RKObjectMapping class (+ subclasses) so +initialize is
[RKEntityMapping class];    //  called to work around RK bug, see GH issue #1631
NSDateFormatter *localOffsetDateFormatter = [[NSDateFormatter alloc] init];
[localOffsetDateFormatter setLocale:[NSLocale currentLocale]];
[localOffsetDateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
[localOffsetDateFormatter setTimeZone:[NSTimeZone localTimeZone]];
[[RKValueTransformer defaultValueTransformer] insertValueTransformer:localOffsetDateFormatter atIndex:0];problem.

也可以在以下位置找到:www.github.com/RestKit/RestKit/issues/1715