org.joda.time.Interval对象的RestKit映射

Question

我有映射简单JSON响应的工作部分。下面是它的样子:

RKObjectMapping *eventMapping = [Event responseMapping];
RKResponseDescriptor *listEventsResponseDescriptor =
[RKResponseDescriptor responseDescriptorWithMapping:eventMapping
                                             method:RKRequestMethodGET
                                        pathPattern:nil
                                            keyPath:nil
                                        statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptor:listEventsResponseDescriptor];

当然还有Event class (DTO)

#import <Foundation/Foundation.h>
#import <RestKit/RestKit.h>
@interface Event : NSObject
@property (nonatomic, strong) NSString *id;
@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSString *detail;
@property (nonatomic, strong) NSString *image;
+ (RKObjectMapping *) responseMapping;
@end
@implementation Event
+ (NSDictionary *) elementToPropertyMappings {
    return @{
             @"id": @"id",
             @"title": @"title",
             @"detail": @"detail",
             @"image": @"image",
             };
}
+ (RKObjectMapping *) responseMapping {
    // Create an object mapping.
    RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[Event class]];
    [mapping addAttributeMappingsFromDictionary:[Event elementToPropertyMappings]];
    return mapping;
}
@end

因此，这种方式允许我处理下一个响应(服务器响应底部的处理字段):

(
        {
        dateInterval =         {
            afterNow = 0;
            beforeNow = 1;
            chronology =             {
                zone =                 {
                    fixed = 0;
                    id = "Europe/Kiev";
                    uncachedZone =                     {
                        cachable = 1;
                        fixed = 0;
                        id = "Europe/Kiev";
                    };
                };
            };
            end =             {
                afterNow = 0;
                beforeNow = 1;
                centuryOfEra = 20;
                chronology =                 {
                    zone =                     {
                        fixed = 0;
                        id = "Europe/Kiev";
                        uncachedZone =                         {
                            cachable = 1;
                            fixed = 0;
                            id = "Europe/Kiev";
                        };
                    };
                };
                dayOfMonth = 12;
                dayOfWeek = 4;
                dayOfYear = 71;
                equalNow = 0;
                era = 1;
                hourOfDay = 13;
                millis = 1426160220000;
                millisOfDay = 49020000;
                millisOfSecond = 0;
                minuteOfDay = 817;
                minuteOfHour = 37;
                monthOfYear = 3;
                secondOfDay = 49020;
                secondOfMinute = 0;
                weekOfWeekyear = 11;
                weekyear = 2015;
                year = 2015;
                yearOfCentury = 15;
                yearOfEra = 2015;
                zone =                 {
                    fixed = 0;
                    id = "Europe/Kiev";
                    uncachedZone =                     {
                        cachable = 1;
                        fixed = 0;
                        id = "Europe/Kiev";
                    };
                };
            };
            endMillis = 1426160220000;
            start =             {
                afterNow = 0;
                beforeNow = 1;
                centuryOfEra = 20;
                chronology =                 {
                    zone =                     {
                        fixed = 0;
                        id = "Europe/Kiev";
                        uncachedZone =                         {
                            cachable = 1;
                            fixed = 0;
                            id = "Europe/Kiev";
                        };
                    };
                };
                dayOfMonth = 12;
                dayOfWeek = 4;
                dayOfYear = 71;
                equalNow = 0;
                era = 1;
                hourOfDay = 13;
                millis = 1426160160000;
                millisOfDay = 48960000;
                millisOfSecond = 0;
                minuteOfDay = 816;
                minuteOfHour = 36;
                monthOfYear = 3;
                secondOfDay = 48960;
                secondOfMinute = 0;
                weekOfWeekyear = 11;
                weekyear = 2015;
                year = 2015;
                yearOfCentury = 15;
                yearOfEra = 2015;
                zone =                 {
                    fixed = 0;
                    id = "Europe/Kiev";
                    uncachedZone =                     {
                        cachable = 1;
                        fixed = 0;
                        id = "Europe/Kiev";
                    };
                };
            };
            startMillis = 1426160160000;
        };
        detail = ""I know you cannot count beyond ten, so I will tell you. Hold up your  two hands. On both of them you have altogether ten fingers and thumbs.  Very well. I now take this grain of sand—you hold it, Hoo-Hoo." He  dropped the grain of sand into the lad's";
        id = 14;
        image = "6f655fd8-ac0d-454f-8b8d-5c93eab34030.png";
        new = 0;
        title = "I know you";
    },
        { ...

关于日期间隔的大部分服务器响应。这个JSON在字段JodaTime Interval上创建了Java Spring。

问题:我如何从这个JSON中获得两个NSDate属性字段?

Answer 1

创建一个与JSON结构匹配的类MyRestKitJodaTimeModel(或多个类)，您可以为此使用RestKit。然后使用数据(您可以使用毫秒)并从中创建一个NSDate。

NSDate datefromJSON = [NSDate dateWithTimeIntervalSince1970:(NSTimeInterval)[myRestKitJodaTimeModel millis]/1000]];

与MyRestKitJodaTimeModel myRestKitJodaTimeModel包含数据从你的JSON。

这假设您有很好的理由使用RestKit，例如许多其他类匹配得很好。另一方面，如果这是您接收到的唯一数据，那么使用RestKit将使您的生活变得更加困难而不是容易。