Question

我有一个带有孩子的视图堆，我想根据应用程序的状态显示/隐藏

    <?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" 
               xmlns:eworx="com.eworx.*"
               xmlns:view="com.eworx.view.*" 
               xmlns:components="com.eworx.view.components.*"
               skinClass="com.eworx.view.skins.MainAppSkin" 
               xmlns:layouts="com.eworx.view.layouts.*"
               currentState="login"
               initialize="init(event)"
               creationComplete="complete(event)" 
               width="100%" 
               height="100%">


    <fx:Style source="assets/css/screen.css" />
    <fx:Script>
        <![CDATA[
            import mx.controls.Alert;
            import mx.core.FlexGlobals;
            import mx.events.FlexEvent;

            import nl.demonsters.debugger.MonsterDebugger;

            private var debugger:MonsterDebugger;

            [Bindable]
            public var apiUrl:String;

            [Bindable]
            public var customerType:String;



            protected function init(event:FlexEvent):void
            {
                debugger = new MonsterDebugger(this);
            }

            protected function complete(event:FlexEvent):void
            {
                var activated:Boolean = FlexGlobals.topLevelApplication.parameters.activated;
                var passwordReset:Boolean = FlexGlobals.topLevelApplication.parameters.passwordReset;
                var message:String = FlexGlobals.topLevelApplication.parameters.message;

                apiUrl = FlexGlobals.topLevelApplication.parameters.apiUrl;

                if(activated)
                {
                    Alert.show(message,"Notice");
                }

                if(passwordReset)
                {
                    Alert.show(message,"Notice");
                }

                systemManager.addEventListener(MouseEvent.MOUSE_WHEEL,onMouseWheel,true);

            }

            private function onMouseWheel(e:MouseEvent):void
            {
                e.delta *= 5;
            }

        ]]>
    </fx:Script>

    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
        <eworx:Seven7Context contextView="{this}" />
        <s:Fade id="fadeIn" alphaFrom="0" alphaTo="1" duration="300" />
        <s:Fade id="fadeOut" alphaFrom="1" alphaTo="0" duration="300" />
        <s:Rotate3D id="r3d" angleYFrom="0" angleYTo="360"  duration="300" />
    </fx:Declarations>

    <s:states>
        <s:State name="login" />
        <s:State name="wholesale"  />
        <s:State name="retail"  />
    </s:states>

    <view:LoginForm id="loginForm" includeIn="login" horizontalCenter="0" verticalCenter="0" />

    <s:Group excludeFrom="login" width="960" horizontalCenter="0">

        <s:BitmapImage width="100%" height="42" x="13" y="80" source="@Embed('assets/garnish/bar.png')" />
        <mx:Image source="assets/garnish/logo.png" top="23" />

        <s:HGroup verticalAlign="middle" x="198" y="47">
            <s:TabBar  skinClass="MainMenuTabBarSkin" dataProvider="{vs}"  buttonMode="true"/>
            <mx:LinkButton id="logout" label="Logout" click="{currentState='login'}" />
        </s:HGroup>

        <s:HGroup top="0" right="0" gap="1" verticalAlign="top">
            <components:OfferList />
            <components:MarginBuildersTrack />
            <components:CartTrack top="0" />
        </s:HGroup>

        <mx:ViewStack 
            id="vs" 
            top="120"
            horizontalCenter="0" 
            width="960" 
            height="100%" 
            resizeToContent="true" >
            <view:HomePage showEffect="{fadeIn}" hideEffect="{fadeOut}" label="Home" />
            <view:ShowroomPage showEffect="{fadeIn}" hideEffect="{fadeOut}" label="Showroom" />
            <view:CataloguePage showEffect="{fadeIn}" hideEffect="{fadeOut}" label="Catalogue" />
            <!--<view:IncentivesPage showEffect="{fadeIn}" hideEffect="{fadeOut}" label="Incentives" />-->
            <view:RetailCustomerProfilePage includeIn="retail" showEffect="{fadeIn}" hideEffect="{fadeOut}" label="My Profile" />
            <view:WholesaleCustomerProfilePage includeIn="wholesale" showEffect="{fadeIn}" hideEffect="{fadeOut}" label="My Profile" />
            <view:ClientsPage excludeFrom="retail,login" showEffect="{fadeIn}" hideEffect="{fadeOut}" label="My Clients" />
            <view:CartPage showEffect="{fadeIn}" hideEffect="{fadeOut}" label="My Cart" />
            <view:OrdersPage showEffect="{fadeIn}" hideEffect="{fadeOut}" label="My Orders" />
        </mx:ViewStack>
    </s:Group>

</s:Application>

如您所见，我可以看到零售状态下的零售客户视图和批发状态下的批发客户视图。问题是，当我运行我的应用程序时，它们不会出现在任何一个州。

有什么想法吗？

Answer 1

这对我来说很奇怪。 ViewStack的全部目的是一次只显示一个项目。这是一个非常奇怪的方法。

我看到你有一个tabbar，其dataProvider是ViewStack。但是，您的ViewStack不会作为组件上的可绑定属性创建，您似乎永远不会设置初始状态。所以，我认为这种情况正在发生：

App Loads处于默认状态，即空字符串
在没有这些孩子的情况下初始化ViewStack和/或TabBar
由于某种原因，应用状态发生了变化
TabBar不会更新

CreationPolicy也可能会发挥作用，但我不确定。你必须逐步完成代码才能弄清楚发生了什么。我强烈建议你考虑另一种方法。可能会根据用户安全设置或当前状态手动创建tabbar导航器dataProvider。

Flex viewstack儿童includeIn works搞笑

1 个答案: