E4X

public var myXML:XML = <order> <item id='1'> <menuName>burger</menuName> <price>3.95</price> </item> <item id='2'> <menuName>fries</menuName> <price>1.45</price> </item> </order>; 

 

trace(myXML.item[0].menuName); // Output: burger
trace(myXML.item.(@id==2).menuName); // Output: fries
trace(myXML.item.(menuName=="burger").price); // Output: 3.95

trace(myXML.item[0].@id);//Output:1

 

 

利用appendChild()来添加子节点的例子：
var newItem:XML =
    <item id="3">
        <menuName>medium cola</menuName>
        <price>1.25</price>
    </item>

myXML.appendChild(newItem);

 

用@ 和 . 操作符不仅能读取数据，还可以赋值：
给子节点赋值：
myXML.item[0].menuName="regular burger";
myXML.item[1].menuName="small fries";
myXML.item[2].menuName="medium cola";
给属性赋值：
myXML.item.(menuName=="regular burger").@quantity = "2";
myXML.item.(menuName=="small fries").@quantity = "2";
myXML.item.(menuName=="medium cola").@quantity = "2";

 

var total:Number = 0;
for each (var property:XML in myXML.item) {
    var q:int = Number(property.@quantity);
    var p:Number = Number(property.price);
    var itemTotal:Number = q * p;
    total += itemTotal;
    trace (q + " " + property.menuName + " $" + itemTotal.toFixed(2))   //toFixed(2)表示四舍五入保留小数点后两位
}
trace ("Total: $", total.toFixed(2));