文章/答案/技术大牛

发布

问Flex 3值感知组合框错误
EN

Stack Overflow用户

提问于 2012-09-05 17:19:15

回答 1查看 615关注 0票数 1

我使用了一个值感知的combobox，它工作得很好，但最近当我尝试点击combobox时，我开始得到下面的错误，错误是随机的。我不确定这是因为我在编码中所做的任何更改，或数据提供商等的一些变化，任何帮助是感激的…

TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at mx.controls::ComboBox/destroyDropdown()
    at mx.controls::ComboBox/styleChanged()
    at mx.core::UIComponent/setBorderColorForErrorString()
    at mx.core::UIComponent/commitProperties()
    at mx.controls::ComboBase/commitProperties()
    at mx.controls::ComboBox/commitProperties()
    at custom.controls::ComboBox/commitProperties()[D:\workspace\eclipse\indigo\ams\flex_src\custom\controls\ComboBox.mxml:13]
    at mx.core::UIComponent/validateProperties()
    at mx.managers::LayoutManager/validateProperties()
    at mx.managers::LayoutManager/doPhasedInstantiation()

调试器抛出

TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at mx.controls::ComboBox/destroyDropdown()
    at mx.controls::ComboBox/styleChanged()
    at mx.core::UIComponent/setBorderColorForErrorString()
    at mx.core::UIComponent/commitProperties()
    at mx.controls::ComboBase/commitProperties()
    at mx.controls::ComboBox/commitProperties()
    at custom.controls::ComboBox/commitProperties()[D:\workspace\eclipse\indigo\ams\flex_src\custom\controls\ComboBox.mxml:13]
    at mx.core::UIComponent/validateProperties()
    at mx.managers::LayoutManager/validateProperties()
    at mx.managers::LayoutManager/doPhasedInstantiation()
    at mx.managers::LayoutManager/validateNow()
    at mx.controls::ComboBox/displayDropdown()
    at mx.controls::ComboBox/downArrowButton_buttonDownHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at mx.core::UIComponent/dispatchEvent()
    at mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::buttonPressed()
    at mx.controls::Button/mouseDownHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at mx.core::UIComponent/dispatchEvent()
    at mx.controls::ComboBase/textInput_mouseEventHandler()

下面是我的代码的一部分

[Bindable]
 private var networkExpObj:NetworkExpansion=new NetworkExpansion();
[Bindable]
 public var codeDescpResult:Object;
    <mx:FormItem label="Status"
                         required="true">
                <controls:ComboBox id="NWEXP_STATUS_ID"
                                   disabledColor="0x000000"
                                   maxWidth="150"
                                   change="validateUs()"
                                   selectedValue="{networkExpObj.NWEXP_STATUS_ID}"
                                   dataProvider="{codeDescpResult.SRV_NWE_STATUS}"/>
            </mx:FormItem>

actionscript-3

apache-flex

combobox

flex3

回答 1

Stack Overflow用户

发布于 2013-02-05 10:04:24

Apache Flex 4.10 (尚未发布)中的问题已修复，请参阅https://issues.apache.org/jira/browse/FLEX-33382。

如果使用较旧的SDK，您可以像这样为mx:ComboBox打补丁，并添加"&& tween“检查：

private function destroyDropdown():void
{
    if (inTween && tween)
        tween.endTween();

    displayDropdown(false, null, false);
}

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/12278197

复制

相似问题

问Flex 3值感知组合框错误
EN

回答 1

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问Flex 3值感知组合框错误EN

回答 1

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问Flex 3值感知组合框错误
EN