RestKit RKObjectMapping嵌套json

如何映射下面的嵌套json与RestKit RKObjectMapping？我只需要映射“数据”。我目前的代码返回（空） - 谢谢！RestKit RKObjectMapping嵌套json

{ 

    "sucess": true, 
    "error": { 
     "code": "", 
     "message": "" 
    }, 
    "data": [ 
     { 
      "id": 1, 
      "name": "Salad", 
      "description": "Salad Desc", 
      "category_id": 1 
     }, 
     { 
      "id": 2, 
      "name": "Soup", 
      "description": "Soup Desc", 
      "category_id": 1 
     }, 
     { 
      "id": 3, 
      "name": "Wrap", 
      "description": "Wrap Desc", 
      "category_id": 1 
     }, 
     { 
      "id": 4, 
      "name": "Appetizers", 
      "description": "Appetizers Desc", 
      "category_id": 1 
     } 
    ] 

}

类

@interface Subcategory : NSObject  
    @property (nonatomic, retain) NSNumber *subcategoryID; 
    @property (nonatomic, retain) NSNumber *categoryID; 
    @property (nonatomic, retain) NSString *name; 
    @property (nonatomic, retain) NSString *description; 
    @property (nonatomic, retain) NSString *thumbnail; 
    @property (nonatomic, retain) NSArray *data;

的ViewController

RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Subcategory class]]; 

RKObjectMapping* dataMapping = [RKObjectMapping mappingForClass:[Subcategory class]]; 
[dataMapping mapKeyPath:@"id" toAttribute:@"subcategoryID"]; 
[dataMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"]; 
[dataMapping mapAttributes:@"name", @"description", nil]; 

[mapping mapKeyPath:@"data" toRelationship:@"data" withMapping:dataMapping]; 

[[RKObjectManager sharedManager] loadObjectsAtResourcePath:[NSString stringWith

来源

2012-04-16 steamboy

为了他人的利益，https://github.com/RestKit/RestKit/wiki/Object-mapping是开始时的重要资源来RK对象映射。 – 2012-07-19 22:44:57

快速的问题，我不是一个ObjC大师，但我被告知NSString属性应该是'复制'而不是'保留'，但我看到NSString属性保留在相当多的开源项目和帖子在这里 - 是在这种情况下使用'保留'的理由@steamboy？ – powerj1984 2012-12-10 03:05:59

你缺少rootKeyPath也设置在供应商的映射：

RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Subcategory class]];  
RKObjectMapping* dataMapping = [RKObjectMapping mappingForClass:[Subcategory class]]; 
[dataMapping mapKeyPath:@"id" toAttribute:@"subcategoryID"]; 
[dataMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"]; 
[dataMapping mapAttributes:@"name", @"description", nil]; 
dataMapping.rootKeyPath = @"data"; //this is what you were missing  
//get your mapping provider (i'm not sure if you already have on declared) 
[mappingProvider setObjectMapping:dataMapping forResourcePathPattern:@"/somepath/toservice/"]; 
[[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/somepath/toservice/"];

这里有更多的信息来回答你关于问题让其他元素（例如“错误”）：

- (void)objectLoader:(RKObjectLoader *)objectLoader didFailWithError:(NSError *)error { 
    NSError *parseError = nil; 
    id response = [objectLoader.response parsedBody:&parseError]; 
    DLog(@"response %@", response);  
    if (!parseError) { 
     NSString *errorMessage = [[response valueForKey:@"error"] valueForKey:@"message"];  
     //do something with it  
    } 
}

来源

2012-04-24 16:40:01 shawnwall

我加了dataMapping = @“data”;和我收到此错误“不兼容的指针类型分配给来自NSString”'RKObjectMapping * _strong'“ – steamboy 2012-04-26 13:12:15

非常抱歉我的错字。你需要dataMapping.rootKeyPath – shawnwall 2012-04-26 16:49:58

你测试过了吗？我在自己的代码中做类似的事情，所以我知道rootKeyPath的作用。 – shawnwall 2012-04-29 21:10:45

RestKit RKObjectMapping嵌套json

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