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。这是它的样子：

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

当然还有事件 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（服务器响应底部的已处理字段）：

(
        {
        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&mdash;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";
    },
        { ...

服务器的大部分响应都是关于日期间隔的。 JSON 在字段 JodaTime Interval.

上创建了 Java Spring

问题：如何从这个JSON中得到两个 NSDate属性字段？

Answer 1

创建一个 class MyRestKitJodaTimeModel（或多个 classes）匹配 JSON 结构，你可以为它使用 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]];

MyRestKitJodaTimeModel myRestKitJodaTimeModel 包含来自您的 JSON 的数据。

这假设您有充分的理由使用 RestKit，例如许多其他 classes 匹配得很好。另一方面，如果这是你收到的唯一数据，那么使用 RestKit 会让你的生活变得更加困难而不是容易。

org.joda.time.Interval 对象的 RestKit 映射

RestKit mapping for org.joda.time.Interval obj

json

objective-c

httpresponse

jodatime

restkit