Flex控件之repeater和radioButton应用

代码：http://www.cnblogs.com/modou/articles/2108346.html

<?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">

    <s:layout> 

        <s:BasicLayout/> 

    </s:layout> 

    

    <fx:Script> 

        <![CDATA[ 

            import mx.controls.Alert; 

            import mx.events.FlexEvent; 

            

            protected function button1_clickHandler(event:MouseEvent):void

            { 

                Alert.show(radiogroup1.selectedValue.toString()); 

            } 

            

            

            protected function radiobutton1_creationCompleteHandler(event:FlexEvent):void

            { 

                

                var rb:RadioButton =event.currentTarget as RadioButton; 

                if(rb==radiogroup1.getRadioButtonAt(2)) 

                { 

                    rb.selected = true; 

                } 

            } 

            

        ]]> 

    </fx:Script> 

    

    

    <fx:Declarations> 

        

        <fx:Array id="arr"> 

            <fx:Object label="北京" data="010" /> 

            <fx:Object label="上海" data="021" /> 

            <fx:Object label="天津" data="022" /> 

            <fx:Object label="重庆" data="023" /> 

            <fx:Object label="广州" data="020" /> 

        </fx:Array> 

        

        <s:RadioButtonGroup id="radiogroup1"  /> 

    </fx:Declarations> 

    

    <s:Button x="336" y="316" label="按钮" click="button1_clickHandler(event)"/> 

    <mx:VBox x="100" y="200" height="200" width="200" borderVisible="true" borderStyle="outset"> 

        <mx:Repeater dataProvider="{arr}"  id="radioRepeater" x="52" y="38"> 

            <s:RadioButton label="{radioRepeater.currentItem.label}" value="{radioRepeater.currentItem.data}" groupName="radiogroup1"
 creationComplete="radiobutton1_creationCompleteHandler(event)" /> 

        </mx:Repeater> 

    </mx:VBox> 

</s:Application> 

 

 

1.首先先用fx:Array生成数据对象，fx:Array需要放在fx:Declarations声明部分

2.添加一个s:RadioButtonGroup，也需要放在fx:Declarations声明部分

3.添加一个mx:Repeater组件，并在mx:Repeater组件内添加一个s:RadioButton组件给mx:Repeater组件设置数据源，那么数据源有几条数据，就会生成几个RadioButton

　　由于mx:Repeater组件必须包在基于Halo的容器中，所以还需要在mx:Repeater组件外包一个mx:VBox组件

4.通过radiogroup1.selectedValue.toString()，可以获取当前选择项的value值

5.如果需要默认绑定第一个RadioButton，可以在RadioButton组件添加creationComplete事件，监测如果是第一项，就选中