flex_(视图状态)使用创建和销毁策略;

<?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="1024" minHeight="768" pageTitle="TheStudioOfCenyebao" ?? ??? ??? ??? applicationComplete="initFn(event)"> ?? ? ?? ?<!-- Demo_(视图状态)使用创建和销毁策略(Using creation and destruction policies) --> ?? ? ?? ?<s:layout> ?? ??? ?<s:VerticalLayout paddingLeft="20" paddingTop="20"/> ?? ?</s:layout> ?? ? ?? ?<s:states> ?? ??? ?<s:State name="orange" stateGroups="box"/> ?? ??? ?<s:State name="black" stateGroups="box"/> ?? ??? ? ?? ??? ?<s:State name="green" stateGroups="circle"/> ?? ??? ?<s:State name="blue" stateGroups="circle"/> ?? ?</s:states> ?? ? ?? ?<fx:Script> ?? ??? ?<![CDATA[ ?? ??? ??? ? ?? ??? ??? ?protected function initFn(event:Event):void{ ?? ??? ??? ??? ?trace("=>initFn_start"); ?? ??? ??? ??? ?log(event);?? ? ?? ??? ??? ??? ?trace(boxElement,circleElement); ?? ??? ??? ??? ?trace("=>initFn_end"); ?? ??? ??? ?} ?? ??? ??? ? ?? ??? ??? ?protected function log(event:Event):void{ ?? ??? ??? ??? ?trace("=>log()_start"); ?? ??? ??? ??? ?trace(event.target.id,event.type); ?? ??? ??? ??? ?trace("=>log()_end"); ?? ??? ??? ?} ?? ??? ?]]> ?? ?</fx:Script> ?? ? ?? ?<!--view--> ?? ?<s:Button label.orange="Black" label.black="Green" label.green="Blue" label.blue="Orange" ?? ??? ??? ?? click.orange="currentState='black'" click.black="currentState='green'" ?? ??? ??? ?? click.green="currentState='blue'" click.blue="currentState='orange'"/> ?? ?<s:Group id="boxElement" includeIn="box" itemCreationPolicy="deferred" itemDestructionPolicy="auto" ?? ??? ??? ? creationComplete="log(event);" addedToStage="log(event);" removedFromStage="log(event);"> ?? ??? ?<s:Rect width="200" height="200"> ?? ??? ??? ?<s:fill> ?? ??? ??? ??? ?<s:SolidColor color.black="black" color.orange="#de7800"/> ?? ??? ??? ?</s:fill> ?? ??? ?</s:Rect> ?? ?</s:Group> ?? ? ?? ?<s:Group id="circleElement" includeIn="circle" itemCreationPolicy="immediate" itemDestructionPolicy="never" ?? ??? ??? ? creationComplete="log(event);" addedToStage="log(event);" removedFromStage="log(event);"> ?? ??? ?<s:Ellipse width="200" height="200"> ?? ??? ??? ?<s:fill> ?? ??? ??? ??? ?<s:SolidColor color.green="green" color.blue="blue" /> ?? ??? ??? ?</s:fill> ?? ??? ?</s:Ellipse> ?? ?</s:Group> ?? ? </s:Application>