Tab切换

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/mx">
 <fx:Script>
  <![CDATA[
   import mx.events.FlexEvent;
   import mx.events.ItemClickEvent;
   import mx.controls.tabBarClasses.Tab;  
   
   protected function tabBar_creationComplete(event:FlexEvent):void
   {
    var colorArr:Array = ["red", "haloOrange", "yellow", "haloGreen", "haloBlue"];  
    var color:String;
    var tab:Tab;  
    var idx:uint;  
    var len:uint = tabBar.dataProvider.length;
    for(idx=0;idx<len;idx++){
     var i:int=idx%colorArr.length;
     color=colorArr[i];
     tab = Tab(tabBar.getChildAt(idx));  
     tab.setStyle("fillColors", [color, "white"]);  
     tab.setStyle("fillAlphas", [1.0, 1.0]);  
     tab.setStyle("backgroundColor", color);
    }
   }
   
   protected function tabBar_itemClick(event:ItemClickEvent):void
   {
    viewStack.selectedIndex=event.index;
   }
   
  ]]>
 </fx:Script>
 <fx:Declarations>
  <!-- Place non-visual elements (e.g., services, value objects) here -->
  <fx:Array id="arr">  
   <fx:Object label="Red" />  
   <fx:Object label="Orange" />  
   <fx:Object label="Yellow" />  
   <fx:Object label="Green" />  
   <fx:Object label="Blue" />  
  </fx:Array>  
 </fx:Declarations>
 <s:layout>
  <s:VerticalLayout gap="5"/>
 </s:layout>
 <mx:TabBar id="tabBar" dataProvider="{arr}" creationComplete="tabBar_creationComplete(event)"
      itemClick="tabBar_itemClick(event)"/>
 <mx:ViewStack id="viewStack" width="{tabBar.width}" styleName="plain">
  <mx:VBox id="redVBox" width="100%" height="100">
   <s:Label text="Red VBox"/>
  </mx:VBox>
  <mx:VBox id="orangeVBox" width="100%" height="100">  
   <mx:Label text="Orange VBox" />  
  </mx:VBox>  
  <mx:VBox id="yellowVBox" width="100%" height="100">  
   <mx:Label text="Yellow VBox" />  
  </mx:VBox>  
  <mx:VBox id="greenVBox" width="100%" height="100">  
   <mx:Label text="Green VBox" />  
  </mx:VBox>  
  <mx:VBox id="blueVBox" width="100%" height="100">  
   <mx:Label text="Blue VBox" />  
  </mx:VBox>  
 </mx:ViewStack>
</s:WindowedApplication>