ios - RestKit:映射到具有特定类型值的 NSDictionary

Question

我从我的网络服务中获得了以下 JSON:

  "GasPrices":{
     "Ai92":{
        "Price":30.1000,
        "LastDate":"\/Date(1385337600000)\/",
        "Votes":0
     },
     "Ai95":{
        "Price":33.2000,
        "LastDate":"\/Date(1385337600000)\/",
        "Votes":0
     }

我想将它映射到 NSDictionary，它的键是 NSString，值是我的自定义类，比如 PriceInfo .

我现在使用默认设置得到的是 NSDictionary，其值也是 NSDictionaries。

如何实现所需的映射？

UPD。这是我现在的完整设置。

@interface FillingStation : NSObject
@property (nonatomic, strong) NSNumber *uid;
@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSDictionary *fuelPrices;
@end

@interface PriceInfo : NSObject
@property (nonatomic, strong) NSNumber *price;
@property (nonatomic, strong) NSDate *lastDate;
@property (nonatomic, strong) NSNumber *votes;
@end

配置映射:

RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[FillingStation class]];
[mapping addAttributeMappingsFromDictionary:@{
        @"Id" : @"uid",
        @"Title" : @"title",
        @"GasPrices" : @"fuelPrices"
}];

这导致 fuelPrices 是 NSDictionary 结构:

NSString -> NSDictionary,
NSString -> NSDictionary,
...

我希望它是:

NSString -> PriceInfo,
NSString -> PriceInfo,
...

而且我不想要 FillingStation 中的中间字典，然后我可以手动映射它。

Answer 1

好的，看来我找到了答案。不完全是我想要的，但我可以接受:https://github.com/RestKit/RestKit/wiki/Object-Mapping#handling-dynamic-nesting-attributes

我必须向 PriceInfo 类添加另一个属性，并将 fuelPrices 从 NSDictionary 更改为 NSSet(NSArray 也可以，但我不需要排序)，所以它变成了:

@interface FillingStation : NSObject
@property (nonatomic, strong) NSNumber *uid;
@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSSet *fuelPrices;
@end

@interface PriceInfo : NSObject
@property (nonatomic, strong) NSString *fuelType;
@property (nonatomic, strong) NSNumber *price;
@property (nonatomic, strong) NSDate *updateDate;
@property (nonatomic, assign) NSUInteger votes;
@end

我的映射现在看起来像这样:

RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[FillingStation class]];
[mapping addAttributeMappingsFromDictionary:@{
        @"Id" : @"uid",
        @"Title" : @"title"
}];

RKObjectMapping *priceInfoMapping = [RKObjectMapping mappingForClass:[PriceInfo class]];
[priceInfoMapping setForceCollectionMapping:YES];
[priceInfoMapping addAttributeMappingFromKeyOfRepresentationToAttribute:@"fuelType"];
[priceInfoMapping addAttributeMappingsFromDictionary:@{
        @"(fuelType).Price": @"price",
        @"(fuelType).LastDate": @"updateDate",
        @"(fuelType).Votes": @"votes"
}];

[mapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"GasPrices"
                                                                        toKeyPath:@"fuelPrices"
                                                                      withMapping:priceInfoMapping]];