无法使用 TouchXML 获取名称中带有冒号的 XML 元素
我有以下代码：
NSString *subtitle = [[[node elementsForName:@"subtitle"] objectAtIndex:0] stringValue];
NSString *duration = [[[node elementsForName:@"itunes:duration"] objectAtIndex:0] stringValue];
第一行工作完美。但第二行不起作用。我认为它与名称空间有关，但我对这一切都很陌生，所以我将不胜感激任何指导。谢谢你！
事实证明，我可以使用 elementsForLocalName:URI: 正确读取元素。现在的问题是，由于我使用的是 TouchXML 库，该方法似乎没有映射到 CXMLElement 结构（请参阅 此处）。
所以现在的问题是：如何将 CXMLElement 转换为 NSXMLElement 以便我可以使用该方法？
I have the following code:
NSString *subtitle = [[[node elementsForName:@"subtitle"] objectAtIndex:0] stringValue];
NSString *duration = [[[node elementsForName:@"itunes:duration"] objectAtIndex:0] stringValue];
The first line works perfectly. The second line though won't work. I assume it has something to do with namespaces, but I'm pretty new to all of this so I would appreciate any guidance. Thank you!
It turns out that I can use the elementsForLocalName:URI: to read the element correctly. Now the problem is that since I am using the TouchXML library, it doesn't seem like that method has been mapped over to the CXMLElement structure (see here).
So the question now is: how can I convert a CXMLElement to an NSXMLElement so that I can use that method?
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“itunes”是命名空间标识符。它本身实际上没有任何意义，它只是将 URI 与相关元素链接起来。您似乎正在使用 iTunes RSS 扩展，该扩展位于
http://www.itunes.com/dtds/podcast-1.0.dtd命名空间下。因此，对于命名空间元素，我认为（我不熟悉 Objective-C 或 NSXML :P）你想要使用
elementsForLocalName相反：对于第二个问题的答案，请参阅下面的评论。
"itunes" is the namespace identifier. It doesn't actually have any significance on its own, it just links a URI with the element in question. It looks like you're using the iTunes RSS extensions, which live under the namespace
http://www.itunes.com/dtds/podcast-1.0.dtd.So, for namespaced elements, I think (I'm not familiar with Objective-C or NSXML :P) you want to use
elementsForLocalNameinstead:For the answer to the second question, see comments below.