Question

我使用Rest Kit来解析服务器中的数据。我从服务器获得了这个JSON：

{
  "title":""
  "data":
    {
      "container":
                 [
                   {
                     "container_award":
                       [[[{"title":"","image":""}]]]
                   }
                 ],...
    }
}

我需要创建映射才能执行此操作。我的问题在于为container_award创建映射，因为我不知道如何在Rest Kit的映射中获取嵌套数组。

有我的映射，但不起作用：

RKObjectMapping *responseMapping = [RKObjectMapping mappingForClass:[Card class]];

[responseMapping addAttributeMappingsFromDictionary:[Card getMapping]];


// if we have keyPath we also cold have subKeyPath

RKObjectMapping *cardContainerArrayMapping = [RKObjectMapping mappingForClass:[CardContainerArray class]];

RKObjectMapping *cardContainerMapping = [RKObjectMapping mappingForClass:[CardContainer class]];
[cardContainerMapping addAttributeMappingsFromDictionary:[CardContainer getMapping]];

RKObjectMapping *containerDataMapping = [RKObjectMapping mappingForClass:[CardContainerData class]];
[containerDataMapping addAttributeMappingsFromDictionary:[CardContainerData getMapping]];


// for three array
RKObjectMapping *containerDataAwardsMapping = [RKObjectMapping mappingForClass:[CardContainerData class]];
[containerDataAwardsMapping addAttributeMappingsFromDictionary:[CardContainerData getMapping]];

RKObjectMapping *array1Mapping = [RKObjectMapping mappingForClass:[NSArray class]];
[array1Mapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:nil
                                                                              toKeyPath:nil
                                                                            withMapping:containerDataAwardsMapping]];


RKObjectMapping *array2Mapping = [RKObjectMapping mappingForClass:[NSArray class]];
[array2Mapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:nil
                                                                              toKeyPath:nil
                                                                            withMapping:array1Mapping]];

[cardContainerMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"container_awards"
                                                                                     toKeyPath:@"container_awards"
                                                                                   withMapping:array2Mapping]];

[cardContainerArrayMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"containers"
                                                                                toKeyPath:@"containers"
                                                                              withMapping:cardContainerMapping]];

[responseMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"data"
                                                                                toKeyPath:@"data"
                                                                              withMapping:cardContainerArrayMapping]];

编辑：卡类

@class CardContainerArray;

@interface Card : NSObject

@property(nonatomic,strong) NSString *title;
@property(nonatomic,strong) CardContainerArray *data;

CardContainerArray类：

@interface CardContainerArray : NSObject

@property(nonatomic,strong) NSArray *container;

@end

CardContainer类： @interface CardContainer：NSObject

@property(nonatomic,strong) NSArray*  container_award;

CardContainerData：

@interface CardContainerData : NSObject

@property(nonatomic,strong) NSString *title;
@property(nonatomic,strong) NSString *image;

Answer 1

你需要一个容器＆＃39;用于处理JSON中container的类，因为您无法作为映射的一部分索引到数组中。这个＆＃39;容器＆＃39;可以是一个自定义类，也可以是一个简单的字典，它取决于你想要的最终数据。

您也可以将container映射到现有类的数组中，然后自己处理字典数组。

[[[{"title":"","image":""}]]]非常垃圾，真的应该被清理掉，因为三重嵌套数组似乎不合逻辑......

在编辑中，您并不想真正映射到NSArray。最好它应该是NSMutableArray，但你没有映射数组，你映射数组的内容。

处理[[[{"title":"","image":""}]]]：

可能最简单的选择就是作弊...你已经有@property(nonatomic,strong) NSString *title;和@property(nonatomic,strong) NSString *image;，但不要在映射中使用它。相反，简单地使映射imageMessyArray并使用：

- (NSArray *)imageMessyArray { return @[]; }
- (void)setImageMessyArray:(NSArray *)messyArray {
    NSDictionary *imageDict = [[[messyArray firstObject] firstObject] firstObject];
    self.title = [imageDict objectForKey:@"title"];
    self.image = [imageDict objectForKey:@"image"];
}

它真的很乱。

正确的方法是创建一个到CardContainerData变换器的数组，它基本上会包装相同的代码，但会更干净地封装它。

RestKit为嵌套数组

1 个答案: