Objective-C RestKit 无输出

Question

我正在使用 RestKIT 为我想使用的 API 发出 GET 请求。可惜没有输出。这是 GET 请求的输出：

{
  "return_code": 0,
  "return_message": "",
  "result": {
    "products_count": 2,
    "product": [
      {
        "id": "2440508995",
        "name": "Long Sweater",
        "description": "This product guarantees warmth in times of need.",
        "price": 8,
        "categories_ids": "73978179"
      },
      {
        "id": "2455113539",
        "name": "Tommy Hilfiger Pants",
        "description": "Exclusive brown pants",
        "price": 13,
        "categories_ids": ""
      }
    ]
  }
}

显然我只想要一个数组，其中存储了所有产品。这是我的方法。

- (void)loadProducts
{
    RKObjectMapping* resultMapping = [RKObjectMapping mappingForClass:[Result class]];
    [resultMapping addAttributeMappingsFromDictionary:@{
                                                          @"products_count": @"products_count",

                                                          }];

    RKObjectMapping* productMapping = [RKObjectMapping mappingForClass:[Product class]];
    [productMapping addAttributeMappingsFromDictionary:@{
                                                         @"id": @"id",
                                                         @"name": @"name",
                                                         @"description": @"description",
                                                         @"price": @"price",
                                                         @"categories_ids": @"categories_ids"
                                                         }];

    [resultMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"product" toKeyPath:@"product" withMapping:productMapping]];



    RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:productMapping method:RKRequestMethodAny pathPattern:nil keyPath:@"result" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];

    NSURL *URL = [NSURL URLWithString:@"https://api.api2cart.com/v1.0/product.list.json?api_key=//some keyf&store_key=//some key"];
    NSURLRequest *request = [NSURLRequest requestWithURL:URL];
    RKObjectRequestOperation *objectRequestOperation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[ responseDescriptor ]];
    [objectRequestOperation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {

        RKLogInfo(@"Load collection of Products: %@", mappingResult.array);
    } failure:^(RKObjectRequestOperation *operation, NSError *error) {
        RKLogError(@"Operation failed with error: %@", error);
    }];

    [objectRequestOperation start];

}

我制作了两个 classes，一个用于具有 NSNumber "products_count" 的结果，一个具有所有产品态度的 Product class。问题是即使建立了连接并且没有 "error"，mappingResult.array 显然是空的。代码有什么错误？

Answer 1

您实际上并不需要 Result class，因为阵列已经为您提供了帐户，您可以直接进入阵列。

因此，您最初的问题是您在响应描述符中使用了错误的映射。您只需要切换到结果映射即可。

您可以在响应描述符中使用产品映射，但您应该将关键路径更改为result.products。

您的产品映射也有问题，因为 description 是所有 NSObject 子 class 上的现有方法，因此您需要通过添加属性称为 overview 或 title.

Objective-C RestKit 无输出

Objective-C RestKit no Output

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