TabNavigator中页面切换使用Move效果

<mx:TabNavigator xmlns:mx="http://www.adobe.com/2006/mxml"
                 width="100%"
                 height="100%">
        <mx:Move id="hideEffect"
        xTo="{-this.stage.width}" />
    <mx:Move id="showEffect"
        xFrom="{this.stage.width}"/>   
             <mx:VBox label="用户角色"
                                 showEffect="{showEffect}"
                                 hideEffect="{hideEffect}"/>
<mx:VBox label="用户信息"
                                 showEffect="{showEffect}"
                                 hideEffect="{hideEffect}"/>
<mx:VBox label="用户组织"
                                 showEffect="{showEffect}"
                                 hideEffect="{hideEffect}"/>
</mx:TabNavigator>