使用Flex SDK 4.0或4.1编译Flex项目时没有问题。但是当我切换到SDK 4.5时（因为我们的小组开始使用flash builder 4.5），我在打开一个窗口时弹出了一个错误（弹出一个小部件窗口）。我在网上搜索了几天，但仍然不知道导致问题的原因。
请帮忙。
以下是错误消息：
ArgumentError: Error #2015: Invalid BitmapData.
at flash.display::BitmapData/ctor()
at flash.display::BitmapData()
at spark.effects.supportClasses::AnimateTransitionShaderInstance/play()
at spark.effects.supportClasses::AnimateInstance/startEffect()
at mx.effects::Effect/play()
at mx.core::UIComponent/commitCurrentState()
at mx.core::UIComponent/commitProperties()
at spark.components.supportClasses::GroupBase/commitProperties()
at spark.components::Group/commitProperties()
at mx.core::UIComponent/validateProperties()
at spark.components::Group/validateProperties()
at mx.managers::LayoutManager/validateProperties()
at mx.managers::LayoutManager/doPhasedInstantiation()
at mx.managers::LayoutManager/doPhasedInstantiationCallback()
这是mxml：
<?xml version="1.0" encoding="utf-8"?>
<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<!-- host component -->
<fx:Metadata>
[HostComponent("widgets.BatchGeocoder.components.AddressMapper")]
</fx:Metadata>
<!-- SkinParts
name=ddlCityField, type=spark.components.DropDownList, required=true
name=ddlCountryField, type=spark.components.DropDownList, required=true
name=ddlAddressField, type=spark.components.DropDownList, required=true
name=ddlStateField, type=spark.components.DropDownList, required=true
name=ddlZipField, type=spark.components.DropDownList, required=true
name=btnSubmit, type=spark.components.Button, required=true
-->
<s:layout>
<s:VerticalLayout gap="5"
horizontalAlign="center" />
</s:layout>
<s:Group width="100%"
height="100%">
<s:Label x="5"
y="10"
text="Address: " />
<s:DropDownList x="100"
y="5"
id="ddlAddressField"/>
<s:Button x="250"
y="5"
label="x"
fontSize="4"
width="22"
height="22"
toolTip="Reset Address Field"
skinClass="widgets.BatchGeocoder.components.skins.RefreshButtonSkin"
click="ddlAddressField.selectedIndex = -1" />
<s:Label x="5"
y="40"
text="City: " />
<s:DropDownList x="100"
y="35"
id="ddlCityField"/>
<s:Button x="250"
y="35"
label="x"
fontSize="4"
width="22"
height="22"
toolTip="Reset City Field"
skinClass="widgets.BatchGeocoder.components.skins.RefreshButtonSkin"
click="ddlCityField.selectedIndex = -1"/>
<s:Label x="5"
y="70"
text="State: " />
<s:DropDownList x="100"
y="65"
id="ddlStateField"/>
<s:Button x="250"
y="65"
label="x"
fontSize="4"
width="22"
height="22"
toolTip="Reset State Field"
skinClass="widgets.BatchGeocoder.components.skins.RefreshButtonSkin"
click="ddlStateField.selectedIndex = -1" />
<s:Label x="5"
y="100"
text="Zip: " />
<s:DropDownList x="100"
y="95"
id="ddlZipField"/>
<s:Button x="250"
y="95"
label="x"
fontSize="4"
width="22"
height="22"
toolTip="Reset Zip Code Field"
skinClass="widgets.BatchGeocoder.components.skins.RefreshButtonSkin"
click="ddlZipField.selectedIndex = -1" />
<s:Label x="5"
y="130"
text="Country: " />
<s:DropDownList x="100"
y="125"
id="ddlCountryField"/>
<s:Button x="250"
y="125"
label="x"
fontSize="4"
width="22"
height="22"
toolTip="Reset Country Field"
skinClass="widgets.BatchGeocoder.components.skins.RefreshButtonSkin"
click="ddlCountryField.selectedIndex = -1" />
<s:Label x="5"
y="160"
text="Label: " />
<s:DropDownList x="100"
y="155"
id="ddlLabelField"/>
<s:Button x="250"
y="155"
label="x"
fontSize="4"
width="22"
height="22"
toolTip="Reset Label Field"
skinClass="widgets.BatchGeocoder.components.skins.RefreshButtonSkin"
click="ddlLabelField.selectedIndex = -1" />
</s:Group>
<s:Button id="btnSubmit"
label="Done" />
</s:Skin>
-------------------------------------------- - 谢谢。我有皮肤。问题是它适用于SDK 4.1，而不适用于SDK 4.5。 这是皮肤定义：
<?xml version="1.0" encoding="utf-8"?>
<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<!-- host component -->
<fx:Metadata>
[HostComponent("spark.components.Button")]
</fx:Metadata>
<!-- states -->
<s:states>
<s:State name="disabled" />
<s:State name="down" />
<s:State name="over" />
<s:State name="up" />
</s:states>
<!-- SkinParts
name=labelDisplay, type=spark.components.supportClasses.TextBase, required=false
-->
<s:Group id="holder">
<s:BitmapImage source="@Embed('../../assets/images/GenericRefresh16.png')"
source.over="@Embed('../../assets/images/GenericRefresh16_active.png')" />
</s:Group>
<s:transitions>
<s:Transition>
<s:CrossFade target="{holder}" />
</s:Transition>
</s:transitions>
</s:Skin>
感谢。不幸的是，它不起作用。 但是你是对的，交叉淡化效应导致了这个问题。我删除了下面的代码，并且它有效。
<s:transitions>
<s:Transition autoReverse="true">
<s:CrossFade target="{holder}"/>
</s:Transition>
</s:transitions>
任何想法。请帮忙。
答案 0 :(得分：1)
从堆栈跟踪看，交叉渐变效果似乎是个问题。试试这个：
<s:Group id="holder">
<s:BitmapImage source="@Embed('../../assets/images/GenericRefresh16.png')"
visible.over="false" />
<s:BitmapImage source="@Embed('../../assets/images/GenericRefresh16_active.png')"
visible.over="true" />
</s:Group>
<s:transitions>
<s:Transition autoReverse="true">
<s:CrossFade target="{holder}"/>
</s:Transition>
</s:transitions>