RestKit 从本地存储的 XML 解析/对象映射

Posted 2023-02-23

【中文标题】RestKit 从本地存储的 XML 解析/对象映射

【英文标题】：RestKit parsing/Object mapping from locally stored XML

【发布时间】：2013-11-28 00:42:51

【问题描述】：

我正在下载一个 zip，解压缩它，然后尝试从 zip 中包含的 xml 文件解析和对象映射数据。我知道如果 XML 文件不在 zip 中，我可以执行类似的操作

NSURL *URL = [NSURL URLWithString:@"http://restkit.org/articles"];
    NSURLRequest *request = [NSURLRequest requestWithURL:URL];
    RKObjectRequestOperation *objectRequestOperation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[ responseDescriptor ]];

但是因为我要下载一个 zip，我必须（或者至少我认为我必须）使用以下代码

NSURL *URL = [NSURL URLWithString:@"http://www.mediafire.com/download/6tfd33xkiepx8a3/db_UI.zip"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
self.operation = [[AFHTTPRequestOperation alloc]
                  initWithRequest:request];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"testDownload"];
self.operation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO];

// Set download completion block
[self.operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
 
     NSLog(@"Successfully downloaded file to %@", path);
     NSString *zipPath = path;
     NSString *destinationPath = [paths objectAtIndex:0];
     [SSZipArchive unzipFileAtPath:zipPath toDestination:destinationPath delegate:self];

  failure:^(AFHTTPRequestOperation *operation, NSError *error)
 
     // NSLog(@"error: %@",  operation.responseString);
 ];


// Start download operation
[self.operation start];
[RKMIMETypeSerialization registerClass:[RKXMLReaderSerialization class] forMIMEType:@"application/xml"];

那么在这种情况下，我该如何使用RKObjectMapping。还是有其他选择？........

【问题讨论】：

我知道我不应该在 setCompletionBlockWithSuccess 的 unzipFileAtPath 调用中将 self 设置为委托。我会尝试解决这个问题

【参考方案1】：

这是来自 Rest-Kit 文档，如果您可以更改 MIME 类型，则此解析 JSON 对象，您可以对 XML 执行任何操作

你可以在这里找到它：Rest-Kit docs

NSString* JSONString = @" \"name\": \"The name\", \"number\": 12345";
NSString* MIMEType = @"application/json";
NSError* error = nil;
id<RKParser> parser = [[RKParserRegistry sharedRegistry] parserForMIMEType:MIMEType];
id parsedData = [parser objectFromString:JSONString error:&error];
if (parsedData == nil && error) 
    // Parser error...



RKObjectMappingProvider* mappingProvider = [RKObjectManager sharedManager].mappingProvider;
RKObjectMapper* mapper = [RKObjectMapper mapperWithObject:parsedData mappingProvider:mappingProvider];
RKObjectMappingResult* result = [mapper performMapping];
if (result) 
    // Yay! Mapping finished successfully

【讨论】：

这行得通！如果我想映射到核心数据对象，这将如何改变？