用于iPhone NSXMLParse的.asx文件

Question

我对XML完全陌生。

是否有人有一个示例代码来帮助我构建一个自定义类，该类将解析微软.asx文件以在iPhone上按顺序播放mms流？

一些谷歌用户向我透露，.xml和.asx有一定的关系，不过第二条相对于前者来说非常有限。

我需要在.asx容器中按顺序播放三个流，如下所示：

<asx version="3.0">
<TITLE>MYSONGS</TITLE>
<entry>
<TITLE>www.mysite.com</TITLE>
<ref href="mms://mysite.com/musicFolder/song1.wma" />
</entry>
<entry>
<TITLE>MYSONGS</TITLE>
<ref href="mms://mysite.com/musicFolder/song2.wma" />
</entry>
<entry>
<TITLE>www.mysite.com</TITLE>
<ref href="mms://mysite.com/musicFolder/song3.wma" />
</entry>
</asx>

我已经能够解析mms流，解码和播放wma文件。我只是还无法解析.asx内容，无法按顺序播放流。谢谢!

Answer 1

在我的例子中，我已经能够使用TouchXML成功地解析TouchXML文件(我从http://foobarpig.com/iphone/parsing-xml-element-attributes-with-touchxml.html):的原始版本中修改了这段代码)

         //  we will put parsed data in an a array
        NSMutableArray *res = [[NSMutableArray alloc] init];
        NSURL *url = [NSURL URLWithString: @"http://www.yoursite.com/WindowsMediaDotCom/theFileToParse.asx"];

        /* have TouchXML parse it into a CXMLDocument */
        CXMLDocument *document = [[[CXMLDocument alloc] initWithContentsOfURL:url options:0 error:nil] autorelease];

        NSArray *nodes = NULL;
        //  searching for piglet nodes
        nodes = [document nodesForXPath:@"//ref" error:nil];

        for (CXMLElement *node in nodes) {
            NSMutableDictionary *item = [[NSMutableDictionary alloc] init];
            int counter;
            for(counter = 0; counter < [node childCount]; counter++) {
                //  common procedure: dictionary with keys/values from XML node
                [item setObject:[[node childAtIndex:counter] stringValue] forKey:[[node childAtIndex:counter] name]];
            }

            //  and here it is - attributeForName! Simple as that.
            [item setObject:[[node attributeForName:@"href"] stringValue] forKey:@"href"];  // <------ this magical arrow is pointing to the area of interest

            [res addObject:item];
            [item release];
        }

        //   and we print our results
        NSLog(@"%@", res);