使用 RKParams 向 API 发布帖子并使用 RestKit 使用 RKObjectMapping 映射响应

Posted 2023-02-23

【中文标题】使用 RKParams 向 API 发布帖子并使用 RestKit 使用 RKObjectMapping 映射响应

【英文标题】：Making a post to API with RKParams and mapping the response with RKObjectMapping using RestKit

【发布时间】：2012-05-25 19:30:51

【问题描述】：

现在我正在对我的代码进行大规模重构，并且我想统一我使用 Restkit 的方式。我对我的 API 服务器和 REST 调用进行 RPC 调用的方法是分开的。

使用 objectMapping 进行的 REST 调用和使用 RKClient 进行的 RPC 调用。除此之外，我使用块而不是委托，这很好，但我对它的工作原理有些怀疑。

这是我之前的代码，它可以很好地发布对象并使用委托手动进行映射，之后是使用不发送参数的块的新代码。

//This was the old way...
- (void) upload: (KFMedia *) pic 

    RKParams* imageParams = [RKParams params];
    NSData* imageData = UIImageJPEGRepresentation(pic.image, 0.7f);
    [imageParams setData:imageData MIMEType:@"image/jpg" forParam:@"FileUpload"];

    [[RKClient sharedClient] post:@"/api/upload/" params:imageParams delegate:self]; 



//This is the new way I'm trying...
- (void) upload: (KFMedia *) pic onLoad:(RKObjectLoaderDidLoadObjectBlock) loadBlock onError:(RKRequestDidFailLoadWithErrorBlock)failBlock

    RKParams* imageParams = [RKParams params];
    NSData* imageData = UIImageJPEGRepresentation(pic.image, 0.7f);
    [imageParams setData:imageData MIMEType:@"image/jpg" forParam:@"FileUpload"];

    [[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/api/upload/" usingBlock:^(RKObjectLoader *loader) 

        //Trying to set params here, but it seems that I'm not sending anything :(
        loader.params = imageParams;
        loader.objectMapping = [[RKObjectManager sharedManager].mappingProvider objectMappingForClass:[KFMedia class]];
        loader.delegate = self;
        loader.onDidLoadObject = loadBlock;
        loader.onDidFailWithError = failBlock;
        loader.onDidFailLoadWithError = failBlock;
        loader.onDidLoadResponse = ^(RKResponse *response) 
            [self fireErrorBlock:failBlock onErrorInResponse:response];
        ;

    ];

我发送的请求的正文为空，这意味着参数未正确发送或设置。关于如何让它发挥作用的任何想法？

【参考方案1】：

我刚刚解决了这个问题。要使用 loadObjectsAtResourcePath 发送额外的参数，您必须强制使用

loader.method = RKRequestMethodPOST;

代码如下：

- (void) upload: (KFMedia *) pic onLoad:(RKObjectLoaderDidLoadObjectBlock) loadBlock onError:(RKRequestDidFailLoadWithErrorBlock)failBlock

    RKParams* imageParams = [RKParams params];
    NSData* imageData = UIImageJPEGRepresentation(pic.image, 0.7f);
    [imageParams setData:imageData MIMEType:@"image/jpg" forParam:@"FileUpload"];

    [[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/api/upload/" usingBlock:^(RKObjectLoader *loader) 

        loader.method = RKRequestMethodPOST; //This line solved the problem
        loader.params = imageParams;
        loader.objectMapping = [[RKObjectManager sharedManager].mappingProvider objectMappingForClass:[KFMedia class]];
        loader.delegate = self;
        loader.onDidLoadObject = loadBlock;
        loader.onDidFailWithError = failBlock;
        loader.onDidFailLoadWithError = failBlock;
        loader.onDidLoadResponse = ^(RKResponse *response) 
            [self fireErrorBlock:failBlock onErrorInResponse:response];
        ;

    ];