Flex，XML后代

Question

我想获得所有xml元素（xml后代），它们具有以下属性：

<books>
    <book concept="rr" author="xx"/>
    <book concept="tt" />
    <book concept="yy" />
    <book concept="uu" author="xx"/>
</books>

我需要对包含author属性的xml节点执行xml后代搜索 结果应该是：

<book concept="rr" author="xx"/>
<book concept="uu" author="xx"/>

Answer 1

这应该回答你的问题：

var booksXML: XML = <books>
    <book concept="rr" author="xx"/>
    <book concept="tt" />
    <book concept="yy" />
    <book concept="uu" author="xx"/>
</books>

for each (var xmlBook: XML in booksXML.children())
{
    if (xmlBook.@author != undefined)
        trace(xmlBook.toXMLString());
}

Answer 2

或使用XML选择器：

var booksXML: XML = <books>
    <book concept="rr" author="xx"/>
    <book concept="tt" />
    <book concept="yy" />
    <book concept="uu" author="xx"/>
</books>

var haveAuthor:XMLList = booksXML.book.(attribute("author").length() > 0);
//booksXML.book.(@author) won't work