Question

我使用Restkit OM2接收json并映射到iphone上的对象。我目前对如何构建映射感到困惑，并且可以提供一些帮助。

以下是json文件示例

    {
    -magic_verbs: [
    -{
    lemma: "work"
    position: 5
    score: "0.75"
    value: "working"
    }
    -{
    lemma: "head"
    position: 0
    score: "0.75"
    value: "heading"
    }
],
magic_advs: [
-{
lemma: "not"
position: 2
score: "0.6"
value: "not"
}
-{
lemma: "just"
position: 2
score: "0.6"
value: "just"
}
]
}

我只需要每个这些的引理和值字段。所以例如动词类包含

@interface Verbs : NSManagedObject {

}
@property (nonatomic,retain) NSString *lemma;
@property (nonatomic,retain) NSString *value;

@end

@implementation Verbs

@synthesize lemma,value;

@end

然后我在json中读取并使用下面的代码

创建映射

objectManager = [RKObjectManager objectManagerWithBaseURL:@"http://localhost:3000"];
        objectManager.objectStore = [RKManagedObjectStore objectStoreWithStoreFilename:@"RKRelationshipMappingExample.sqlite"];

        [RKObjectManager setSharedManager:objectManager];

        RKObjectMappingProvider* provider = [[RKObjectMappingProvider new] autorelease];

        RKObjectMapping* verbMapping = [RKObjectMapping mappingForClass:[Verbs class]];
        [verbMapping mapKeyPath:@"lemma" toAttribute:@"lemma"];
        [verbMapping mapKeyPath:@"value" toAttribute:@"value"];
        [provider setMapping:verbMapping forKeyPath:@"magic_verbs"];
 [[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/api/users/1/magic_words" objectMapping:verbMapping delegate:self];

我为adjs映射做了同样的事情。我还有一个名为words的类，它包含2个nsarray，用于包含对象映射数据。但我不确定如何实现这一点并正确链接它们。

@interface Words : NSObject {

    NSArray *_verbs;
    NSArray *_adjs;
}

@property (nonatomic, retain) NSArray *verbs,*adjs;
@end

对此有任何帮助和指导表示赞赏。我已经查看了目录项目中的示例，并且已经能够运行但未能掌握该概念以将其应用于我自己的json文件。

感谢

Answer 1

我建议您查看Github页面here中的OM 2.0新文档如果你还没有注意到它清楚地说明了如何将JSON映射到对象。

Restkit OM2关系映射

1 个答案: