使用 RestKit 0.10 映射 RSS

RestKit支持的类型：

NSString * const RKMIMETypeJSON = @"application/json";
NSString * const RKMIMETypeFormURLEncoded = @"application/x-www-form-urlencoded";
NSString * const RKMIMETypeXML = @"application/xml";
NSString * const RKMIMETypeTextXML = @"text/xml";

对于RSS，虽然是xml格式，但MIMEType会被认为是 application/rss+xml，所以，会提示没有找到对应的解析类

需要增加两行代码，让rss按application/xml，来解析，即可

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    RKURL *baseUrl = [RKURL URLWithBaseURLString:kBASE_URL];
    
    RKObjectManager *manager = [RKObjectManager managerWithBaseURL:baseUrl];
    
    RKObjectMapping *songMapping = [RKObjectMapping mappingForClass:[Song class]];
    [songMapping mapKeyPath:@"title" toAttribute:@"title"];
    
    [manager.mappingProvider setMapping:songMapping forKeyPath:@"rss.channel.item"];
    
    Class class = NSClassFromString(@"RKXMLParserXMLReader");
    [[RKParserRegistry sharedRegistry] setParserClass:class forMIMEType:@"application/rss+xml"];
    
    [manager loadObjectsAtResourcePath:kRESOURCE_PATH delegate:self];
    
}

RKXMLParserXMLReader是xml的解析类

查看全部源代码，https://github.com/iihe602/Using-RestKit-Parse-RSS