Flex，XML的后代

我想获取所有具有以下属性的xml元素（xml后代）：

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

我需要对author属性包含 结果应该是：

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

---

这应该可以回答您的问题：

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());
}

var-booksXML:XML=
对于每个（booksXML.children（）中的var-xmlBook:XML）
{
if（xmlBook@author！=未定义）
trace（xmlBook.toXMLString（））；
}

这应该可以回答您的问题：

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());
}

var-booksXML:XML=
对于每个（booksXML.children（）中的var-xmlBook:XML）
{
if（xmlBook@author！=未定义）
trace（xmlBook.toXMLString（））；
}

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

var-booksXML:XML=
var haveAuthor:xmlist=booksXML.book。（属性（“author”）.length（）>0）；
//booksXML.book（@author）不起作用

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

var-booksXML:XML=
var haveAuthor:xmlist=booksXML.book。（属性（“author”）.length（）>0）；
//booksXML.book（@author）不起作用