Flex creationPolicy²ßÂÔ

ÔÚFlexÖУ¬ÀûÓÃstate½øÐÐ״̬ºÍÒ³ÃæµÄǨÒÆÓë±ä»»£¬ÖмäµÄAddChild IOverrideÓÐÒ»¸öcreationPolicy£¬Õâ¸öÊôÐÔÓÐÈýÖÖÉèÖ㬷ֱðÈçÏ£º
AUTO£ºÄ¬ÈÏÉèÖã¬Ö»ÓÐÔÚ״̬¸Ä±äµÄʱºò£¬¼´Ê±µÄÉú³ÉÐÂÔö×é¼þ£»
ALL£ºÔÚApplication¼ÓÔصÄʱºò£¬¾Í¼ÓÔØÁËÐÂÔöµÄ×é¼þ£¬ÔÚ״̬¸Ä±äµÄʱºòÏÔʾ£»
NONE£ºÐèÒªÊÖ¶¯µÄµ÷ÓøÃaddChild Instance createInstance·½·¨Éú³ÉÐÂÔö×é¼þ£¬·½ÄÜÏÔʾ£»
ʾÀý´úÂëÈçÏ£º
<?xml version="1.0"?>
<!-- states\StatesCreationPolicy.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
creationComplete="initButton();">

<mx:Script>
<!--[CDATA[
// Because the cpAll view state creates the Button control
// at application startup, you can access the control to
// set the label before the first switch
// to the cpAll view state.
public function initButton():void {
newButton.label="cpAll Button";
}
]]-->
</mx:Script>
<mx:states>
<!-- Create the Button control at application startup. -->
<mx:State name="cpAll">
<mx:AddChild relativeTo="{myPanel}" creationPolicy="all">
<mx:Button id="newButton"/>
</mx:AddChild>
</mx:State>
<!-- Create the Button control when you want to create it. -->
<mx:State name="cpNone">
<mx:AddChild id="noCP"
relativeTo="{myPanel}" creationPolicy="none">
<mx:Button label="cpNone button"/>
</mx:AddChild>
</mx:State>
</mx:states>

<mx:Panel id="myPanel"
title="Static and dynamic states"
width="300" height="150">

<!-- Change to the cpAll view state. -->
<mx:Button label="Change to cpAll state"
click="currentState