Iphone 使用RestKit解析嵌套的动态JSON

我正试图用RESTKIT解析以下JSON

并给出了相应的实现方法

+ (RKObjectMapping *) getObjectMapping
{
    RKObjectMapping *objectMapping = [RKObjectMapping mappingForClass:[ImageCollections class]];
    [objectMapping mapKeyPath:@"menu_url" toAttribute:@"ignore"];
    objectMapping.forceCollectionMapping = YES;
    [objectMapping mapKeyOfNestedDictionaryToAttribute:@"keyTerm"];
    [objectMapping mapKeyPath:@"(keyTerm).page" toRelationship:@"menus" withMapping:[ImageUrl getObjectMapping]];
    return objectMapping;
}

类似地，ImageUrl类的对象映射是

+ (RKObjectMapping *) getObjectMapping
{
    RKObjectMapping *objectMapping = [RKObjectMapping mappingForClass:[ImageUrl class]];
    [objectMapping mapKeyPath:@"url" toAttribute:@"url"];
    [objectMapping mapKeyPath:@"thumb_url" toAttribute:@"thumbUrl"];
    return objectMapping;
}

但我有个例外

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ valueForUndefinedKey:]: this class is not key value coding-compliant for the key page.' ***由于未捕获的异常“NSUnknownKeyException”而终止应用程序，原因：“[valueForUndefinedKey:]：此类与密钥页的键值编码不兼容。”

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请帮助..

评估页键路径时所依据的值是什么？您是否尝试过使用单元测试来执行映射

+ (RKObjectMapping *) getObjectMapping
{
    RKObjectMapping *objectMapping = [RKObjectMapping mappingForClass:[ImageUrl class]];
    [objectMapping mapKeyPath:@"url" toAttribute:@"url"];
    [objectMapping mapKeyPath:@"thumb_url" toAttribute:@"thumbUrl"];
    return objectMapping;
}

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ valueForUndefinedKey:]: this class is not key value coding-compliant for the key page.'