as2.0遍历xml子元素

下面的示例说明如何使用 XML.firstChild 遍历节点的子节点：

// create a new XML document
var doc:XML = new XML();

// create a root node
var rootNode:XMLNode = doc.createElement("rootNode");

// create three child nodes
var oldest:XMLNode = doc.createElement("oldest");
var middle:XMLNode = doc.createElement("middle");
var youngest:XMLNode = doc.createElement("youngest");

// add the rootNode as the root of the XML document tree
doc.appendChild(rootNode);

// add each of the child nodes as children of rootNode
rootNode.appendChild(oldest);
rootNode.appendChild(middle);
rootNode.appendChild(youngest);

// use firstChild to iterate through the child nodes of rootNode
for (var aNode:XMLNode = rootNode.firstChild; aNode != null; aNode = aNode.nextSibling) {
    trace(aNode);
}

// output:
// <oldest />
// <middle />
// <youngest />

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