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一般有两种比较好的方式："States" and "viewStack"

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:view="view.*" creationComplete="initApp()" horizontalAlign="center" verticalAlign="middle"> <mx:Style source="style.css" /> <mx:Script> <!--[CDATA[ import flash.events.Event import mx.managers.CursorManager import model.ModelLocator import mx.controls.Alert private var instance:ModelLocator = ModelLocator.getInstance(); internal function initApp():void{ currentState="Login"; instance.addEventListener(ModelLocator.LOGIN_OK,onLoginHandler) instance.addEventListener(ModelLocator.LOGIN_FAILED,onLoginFailHandler) } internal function onLoginHandler(evt:Event):void{ currentState="Main"; } internal function onLoginFailHandler(evt:Event):void{ Alert.show("登陆失败，请重新输入！","密码错了!") } ]]--> </mx:Script> <mx:states> <!-- login state --> <mx:State name="Login"> <mx:AddChild position="lastChild"> <view:loginPanel id="loginPanel"/> </mx:AddChild> </mx:State> <!-- Main state --> <mx:State name="Main"> <mx:AddChild position="lastChild"> <view:main id="mainApp" /> </mx:AddChild> </mx:State> </mx:states> <mx:transitions> <mx:Transition fromState="*" toState="*"> <mx:Iris xFrom="10" targets="{[loginPanel, mainApp]}"/> </mx:Transition> </mx:transitions> <mx:ApplicationControlBar dock="true" fillAlphas="[0.2, 0.7]" > <mx:Label text="名片管理" /> <mx:Spacer width="100%" /> <mx:Label id="txtWelcome" visible="false" /> </mx:ApplicationControlBar> </mx:Application> 

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