解析XML时出现NSXMLParserErrorDomain

Question

我遇到了一个奇怪的问题。我正在制作一个应用程序，它应该在iOS 4&5.当我在iOS 5中解析XML时，它做得很好，我得到了我的输出，但当我试图在iOS 4中进行同样的操作时，我得到的错误是"NSXMLParserErrorDomain error 31"。在中

- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError;

我的XML是这样的。。我需要解析Item标记中的title标记。。。

<item> <title> <![CDATA[ Cynical approach to tar my reputation: Army    Chief on leaked letter ]]> </title> <link> <![CDATA[ ]]> </link>    <guid isPermaLink="false"> <![CDATA[ ]]> </guid> </item> <item>    <title> <![CDATA[ Major fire in scrap godown in suburban Mumbai ]]>    </title> <link> <![CDATA[ ]]> </link> <guid isPermaLink="false">    <![CDATA[ ]]> </guid> </item>

我的解析代码id this：-

-(void)parseBN{
    NSString *URL=@"My XML's URL";
    // convert the path to a proper NSURL
    NSURL *xmlURL = [NSURL URLWithString:URL];
    CTNetworking *request= [CTNetworking requestWithUrl:xmlURL];
    [request setDelegate:self];
    [request setDidFinishSelector:@selector(startParse:)];
    [request startRequest];
}
-(void)startParse:(CTNetworking*)response{
    if (response.responseStatusCode == 200 && rssParser == nil) {
        [stories removeAllObjects];
        NSString *myStr = [[NSString alloc] initWithData:[response responseData] encoding:NSWindowsCP1251StringEncoding];
        myStr = [myStr stringByReplacingOccurrencesOfString:@"encoding="windows-1251"" withString:@""];

        NSData* aData = [myStr dataUsingEncoding:NSASCIIStringEncoding];

     //   NSXMLParser *parser = [[NSXMLParser alloc] initWithData:aData];
        rssParser = [[NSXMLParser alloc] initWithData:aData];
     //   rssParser = [[NSXMLParser alloc] initWithData:[response responseData]];
        // Set self as the delegate of the parser so that it will receive the parser delegate methods callbacks.
        [rssParser setDelegate:self];
        // Depending on the XML document you're parsing
        [rssParser setShouldProcessNamespaces:NO];
        [rssParser setShouldReportNamespacePrefixes:NO];
        [rssParser setShouldResolveExternalEntities:NO];
        [rssParser parse];
    }

}
- (void)parserDidStartDocument:(NSXMLParser *)parser{   
}
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {
    NSString * errorString = [NSString stringWithFormat:@"Unable to download story feed from web site (Error code %i )", [parseError code]];
    NSLog(@"error parsing XML: %@", errorString);
    UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Error loading content" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{    
It is not coming here.. so didn't paste the Inside code
}

我在谷歌上搜索了这个错误，每个人都说这个错误是因为未知编码。。所以我尝试使用"NSWindowsCP1251StringEncoding"代替默认编码。如有任何帮助，我们将不胜感激。

Answer 1

终于让它工作了。。。

NSString *myStr = [[[NSString alloc] initWithData:[response responseData] encoding:NSWindowsCP1251StringEncoding] autorelease];
    myStr = [myStr stringByReplacingOccurrencesOfString:@"encoding="windows-1251"" withString:@""];
    myStr = [myStr stringByReplacingOccurrencesOfString:@"US-ASCII" withString:@"UTF-8"];
    NSData* aData = [myStr dataUsingEncoding:NSASCIIStringEncoding];
    rssParser = [[NSXMLParser alloc] initWithData:aData];
    [rssParser setDelegate:self];
    [rssParser setShouldProcessNamespaces:NO];
    [rssParser setShouldReportNamespacePrefixes:NO];
    [rssParser setShouldResolveExternalEntities:NO];
    [rssParser parse];

通过NSString:）更改了编码类型