Question

我正在使用RestKit的RKClient进行多部分图像数据和一些值的发布，如下所示：

RKParams* params = [RKParams params];
[params setValue:foo.accountId forParam:@"accountId"];
[params setValue:foo.identifier forParam:@"fooId"];
[params setValue:_photoId forParam:@"photoId"];
[params setData:data MIMEType:@"image/png" forParam:@"image"];
[[RKClient sharedClient] post:@"/foo/uploadPhoto" params:params delegate:self];

这很好用，我的后端服务器响应服务器端模型对象的JSON表示，它看起来像这样：

{"id":"4ee2b4670364720c089e75b9","accountId":"4ebee3469ae2d8adf983c561","fooId":"4ec0983d036463d900841f0b","photoId":"E5B20AF1-9F10-4175-8262-852BDA3DEDE9","filename":"4ebee3469ae2d8adf983c561_4ec0983d036463d900841f0b_E5B20AF1-9F10-4175-8262-852BDA3DEDE9","contentType":"image/png"}

我现在需要做的是将其映射到我的客户端（iOS）模型对象。客户端模型对象几乎相同，但不完全相同（因此使用RKJSONParser的objectFromString方法不是一个选项），因此我定义了一个自定义RKObjectMapping来处理映射。 RKClient的委托只获取RKResponse，那么如何使用响应和mapper来获取客户端模型对象的实例呢？

注意：要清楚，我非常熟悉使用RKObjectManager发布对象和映射响应时的工作原理。我的情况的独特部分是我使用RKClient来实现多部分帖子。不幸的是，RKClient似乎没有像RKObjectManager那样可以处理响应映射的简单方法......除非我遗漏了某些东西（我希望并且我都会为你指出这一点;）。

Answer 1

好吧，this post was similar（但是没有功能），它给了我一些在RKObjectLoader上使用这个方法的新技术的想法

- (RKObjectLoader *)postObject:(id<NSObject>)object delegate:(id<RKObjectLoaderDelegate>)delegate block:(void ( ^ ) ( RKObjectLoader *))block

所以现在我可以获得映射的好处，如何使用RKClient并不明显。

路由器设置：

RKObjectManager *objectManager = [RKObjectManager objectManagerWithBaseURL:kApiUrlBase];
[objectManager.router routeClass:[PAPetPhoto class] toResourcePath:@"/pet/uploadPhoto" forMethod:RKRequestMethodPOST];

映射设置：

RKObjectMapping *papetPhotoMapping = [RKObjectMapping mappingForClass:[PAPetPhoto class]];
[papetPhotoMapping mapKeyPath:@"id" toAttribute:@"identifier"];
[papetPhotoMapping mapAttributes:@"accountId", @"petId", @"photoId", @"filename", @"contentType", nil];
[objectManager.mappingProvider addObjectMapping:papetPhotoMapping];
[objectManager.mappingProvider setSerializationMapping:[papetPhotoMapping inverseMapping] forClass:[PAPetPhoto class]];
[objectManager.mappingProvider setMapping:papetPhotoMapping forKeyPath:@"petPhoto"];

帖子：（注意，因为我在块中构建了所有参数，我的对象只是一个虚拟实例来触发正确的路由和映射器。）

    PAPetPhoto *photo = [[PAPetPhoto alloc] init];
    [[RKObjectManager sharedManager] postObject:photo delegate:self block:^(RKObjectLoader *loader){

        RKParams* params = [RKParams params];
        [params setValue:pet.accountId forParam:@"accountId"];
        [params setValue:pet.identifier forParam:@"petId"];
        [params setValue:_photoId forParam:@"photoId"];
        [params setValue:_isThumb ? @"THUMB" : @"FULL" forParam:@"photoSize"];
        [params setData:data MIMEType:@"image/png" forParam:@"image"];

        loader.params = params;
    }];

服务器端点（Java，Spring MVC）

    @RequestMapping(value = "/uploadPhoto", method = RequestMethod.POST)
    @ResponseBody
    public Map<String, Object> handleFormUpload(@RequestParam("accountId") String accountId,
                                    @RequestParam("petId") String petId,
                                    @RequestParam("photoId") String photoId,
                                    @RequestParam("photoSize") PhotoSizeEnum photoSize,
                                    @RequestParam("image") Part image) throws IOException {

        if (log.isTraceEnabled()) 
            log.trace("uploadPhoto. accountId=" + accountId + " petId=" + petId + " photoId=" + photoId + " photoSize=" + photoSize);

        PetPhoto petPhoto = petDao.savePetPhoto(accountId, petId, photoId, photoSize, image);

        Map<String, Object> map = GsonUtils.wrapWithKeypath(petPhoto, "petPhoto");
        return map;
    }

服务器响应JSON （请注意与映射设置对应的“petPhoto”的keyPath）：

{
    petPhoto =     {
        accountId = 4ebee3469ae2d8adf983c561;
        contentType = "image/png";
        filename = "4ebee3469ae2d8adf983c561_4ec0983d036463d900841f09_3FED4959-1042-4D8B-91A8-76AA873851A3";
        id = 4ee2e80203646ecd096d5201;
        petId = 4ec0983d036463d900841f09;
        photoId = "3FED4959-1042-4D8B-91A8-76AA873851A3";
    };
}

<强>代表：

- (void) objectLoader:(RKObjectLoader*)objectLoader didLoadObject:(id)object {

    if ([objectLoader wasSentToResourcePath:@"/pet/uploadPhoto"]) {
       PAPetPhoto *photo = (PAPetPhoto*)object;
    }
}

如何使用RKObjectMapping映射RKClient的RKResponse

1 个答案: