RestKit 0.20错误Domain=org.restkit.RestKit.ErrorDomain代码=-1016

Question

我正在尝试将RestKit 0.20集成到我的项目中，例如，我正在使用google rss阅读器作为示例项目。

这是对Xml的响应

        /                          /category>                         &          

这是我必须从中获取数据的Xml。

RKObjectMapping* articleMapping = [RKObjectMapping mappingForClass:新闻类]；articleMapping addAttributeMappingsFromDictionary:@{ @“标题”：@“标题”，@“链接”：@“链接”，@"guid"：@"guid"，@"pubDate"：@"pubDate"，@"description"：@"description“}；

       NSURL* url = [[NSURL alloc]initWithString:@"http://news.google.com"];
RKObjectManager* objectManager = [RKObjectManager managerWithBaseURL:url];

NSURLRequest* request = [objectManager requestWithObject:nil method:RKRequestMethodGET path:@"/?output=rss" parameters:nil];


RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:articleMapping pathPattern:nil keyPath:@"item" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];

RKObjectRequestOperation *objectRequestOperation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[ responseDescriptor ]];
[objectRequestOperation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
    RKLogInfo(@"Load collection of Articles: %@", mappingResult.array);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
    RKLogError(@"Operation failed with error: %@", error);
}];



[objectRequestOperation start];

上面是我用来获取数据的代码，当我运行应用程序时，我得到了以下错误

I restkit.network:RKObjectRequestOperation.m:174 GET‘restkit.network:RKObjectRequestOperation.m:569’2013-05-28 12:24:15.076 TestApp8940:15203 E应用程序对象请求失败:底层http://news.google.com/?output=rss请求操作失败，错误: Domain=org.restkit.RestKit.ErrorDomain代码=-1016“预期内容类型{(”应用程序/xml“，”应用程序/x-www-form-urlencoded“，”应用程序/json“)}，GET application/rss+xml”UserInfo=0xa80a3d0 {NSLocalizedRecoverySuggestion=NFE/1.0热门新闻-谷歌新闻

有谁能帮忙吗？

Answer 1

正如异常所说，RestKit期望的是以下之一：

1. "application/xml"
2. "application/x-www-form-urlencoded"
3. "application/json"

但它接收的是"application/rss+xml“。你只需要告诉RestKit会发生什么。

您可以询问RestKit是否已经理解mime类型：

[RKMIMETypeSerialization registeredMIMETypes];

如果没有，您将需要向RKMIMETypeSerialization注册一个序列化程序。

并且您可以告诉对象管理器期望哪种mime类型：

[objectManager setAcceptHeaderWithMIMEType:@"application/rss+xml"];