RESTKit：带有字典的 RKMappingResult

Question

下图中是我返回的 JSON。

下面是我的代码映射：

+(RKMapping *)googleMapping
{
    RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[mappingModel class]];

    [mapping addAttributeMappingsFromDictionary:@{
                                                  @"description" : @"description",
                                                  @"reference" : @"reference"
                                                  }];
    return mapping;
}

获取：

RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping
                                                                                            method:RKRequestMethodGET
                                                                                       pathPattern:nil
                                                                                       keyPath:@"predictions" statusCodes:statusCodeSet];
RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:request
                                                                    responseDescriptors:@[responseDescriptor]];

[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {

    NSLog(@"mappingResults %@", mappingResult);

} failure:^(RKObjectRequestOperation *operation, NSError *error) {
    NSLog(@"mappingResults Error %@", error);

}];
[operation start];

NSLog：

2014-03-22 12:42:03.988 Google+RESTKit[21229:60b] I restkit.network:RKObjectRequestOperation.m:180 GET 'https://maps.googleapis.com/maps/api/place/autocomplete/json?input=cofee&sensor=true&key=1234&location=0.000000,0.000000&radius=100.000000'
2014-03-22 12:42:04.031 Google+RESTKit[21229:6a03] I restkit.network:RKObjectRequestOperation.m:250 GET 'https://maps.googleapis.com/maps/api/place/autocomplete/json?input=cofee&sensor=true&key=1234&location=0.000000,0.000000&radius=100.000000' (200 OK / 5 objects) [request=0.0430s mapping=0.0007s total=0.0474s]
2014-03-22 12:42:04.032 Google+RESTKit[21229:60b] mappingResults <RKMappingResult: 0x1733ecf0, results={
    predictions =     (
    "Coffee Road, Modesto, CA, United States",
    "Coffee Bay, Eastern Cape, South Africa",
    "Coffee Road, Bakersfield, CA, United States",
    "Coffeeville, MS, United States",
    "Coffeen, IL, United States"
    );
}>

返回的mappingResult应该是一个带有NSDictionary Objects的数组吧？它似乎在数组中返回“描述”的值，并且没有“参考”值。我究竟做错了什么？

返回的 JSON：

Answer 1

description 是已定义的方法名称，因此通过添加您自己的同名属性，您将覆盖默认实现。所以，你确实有你期望的对象，但是日志打印了你不期望的东西。

更改您的资源名称，使其不与description 重叠。