使用RestKit/iOS映射嵌套数组

Question

我需要使用RestKit映射一个嵌套数组，我已经接近成功了（我想是这样的）。

我需要映射的JSON看起来像这样

[
    {
        _id: "5058670183970a0002000450",
        app_store_url: "http://itunes.apple.com/app/culturonda-alto-adige-sudtirol/id534467629",
        comments: [
            {
                _id: "5058670783970a0002000456",
            },
            {
                _id: "50588d7f83970a000200065c",
            }
        ]
    }
]

我的控制器用于存储信息的样子如下：

#import <Foundation/Foundation.h>
#import "CommentData.h"

@interface DesignData : NSObject
    @property (retain, nonatomic) NSString *designId;
    @property (retain, nonatomic) NSSet *commentsRelationship;
@end

并且：

#import <Foundation/Foundation.h>

@interface CommentData : NSObject
    @property (retain, nonatomic) NSString *commentId;
@end

我的映射如下：

RKObjectManager *objectManager = [RKObjectManager sharedManager];

RKObjectMapping *commentsMapping = [RKObjectMapping mappingForClass:[CommentData class]];
[commentsMapping mapKeyPathsToAttributes:@"_id", @"commentId", nil];

RKObjectMapping *designMapping = [RKObjectMapping mappingForClass:[DesignData class] ];
[designMapping mapKeyPathsToAttributes:@"_id", @"designId", nil];

[designMapping mapKeyPath:@"comments" toRelationship:@"commentsRelationship" withMapping:commentsMapping];

[objectManager.mappingProvider setMapping:designMapping forKeyPath:@""];

评论被放入一个数组中，但它并没有被存储在评论控制器中。如果我像这样在objecloader回调中显示评论：

DesignData *designData = [objects objectAtIndex:0];
NSLog(@"Loaded %@ ", designData.commentsRelationship);

它给了我：

2012-10-20 22:37:55.258 RestKitTest5[4144:c07] Loaded {(
                                                        <CommentData: 0x8689730>,
                                                        <CommentData: 0x868bed0>,
                                                        <CommentData: 0x868bfe0>,
                                                        <CommentData: 0x868bf50>
                                                        )}

这是一个开始。但我不能做到：

DesignData *designData = [objects objectAtIndex:0];
NSLog(@"Loaded %@ ", designData.commentsRelationship.commentId);

那么我该如何将整个东西存储为数组？

- Holger Sindbaek

Answer 1

我替换了这行代码后，它对我起作用了：

[designMapping mapKeyPath:@"comments" toRelationship:@"commentsRelationship" withMapping:commentsMapping];

使用：

[designMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"comments" toKeyPath:@"commentsRelationship" withMapping: commentsMapping]];

- Kazmi

Answer 2

我本来就做对了，只是最后有点傻。

我得到了数组，而且数组中的对象都是正确的类型（CommentData），所以我只需要循环遍历数组，然后就可以单独处理每个对象了。

- Holger Sindbaek