flex 使用绑定，常用的几种方式

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
  xmlns:s="library://ns.adobe.com/flex/spark"
  xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
    <fx:Script>
        <![CDATA[
             [Bindable]
             private var s:String;
             private function changing():void{
                 s=String(hs.value);
            }
        ]]>
    </fx:Script>
   
    <s:layout>
    <s:VerticalLayout verticalAlign="middle" horizontalAlign="center" />
    </s:layout>
   
    <fx:Declarations>
    <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    </fx:Declarations>
   
   
    <s:Label text="大括号绑定:" />
    <s:TextInput id="t1" />
    <s:TextInput id="t2" text="{t1.text}" />
   
   
    <s:Label text="MXML声明绑定" />
    <fx:Binding source="t3.text" destination="t4.text" />
    <s:TextInput id="t3" />
    <s:TextInput id="t4" />
   
   
    <s:Label text="Bindable绑定:" />
     <s:TextInput text="{s}" />
    <s:HSlider width="100" maximum="100" minimum="0" id="hs" change="changing()" />
</s:Application>