Flex FocusManager -按下标签会导致多版本应用程序中的堆栈溢出

Question

我有一个顶级应用程序(它是使用4.6SDK构建的)，它加载一个子应用程序(它是使用4.1SDK构建的)。在应用程序的这种状态下，大多数内容都包含在子应用程序中，顶部应用程序中的一些UI元素在子应用程序的内容周围形成了一个框架(或"HUD")。

在没有文本输入字段接收焦点的情况下，按选项卡将导致Flash严重崩溃，错误#1023:堆栈溢出。

下面是一个堆栈跟踪示例：

Error: Error #1023: Stack overflow occurred.
at mx.managers.systemClasses::MarshallingSupport/get swfBridgeGroup()
at mx.managers.systemClasses::MarshallingSupport/getSWFBridgeOfDisplayObject()
at mx.managers.systemClasses::MarshallingSupport/isDisplayObjectInABridgedApplication()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/keyDownHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers::FocusManager/http://www.adobe.com/2006/flex/mx/internal::keyDownHandler()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocus()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocusToParent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/setFocusToComponentHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers::FocusManager/setFocusToComponent()
at mx.managers::FocusManager/setFocusToNextObject()
at mx.managers::FocusManager/http://www.adobe.com/2006/flex/mx/internal::keyFocusChangeHandler()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocus()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocusToParent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/setFocusToComponentHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers::FocusManager/setFocusToComponent()
at mx.managers::FocusManager/setFocusToNextObject()
at mx.managers::FocusManager/http://www.adobe.com/2006/flex/mx/internal::keyFocusChangeHandler()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocus()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocusToParent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/setFocusToComponentHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers::FocusManager/setFocusToComponent()
at mx.managers::FocusManager/setFocusToNextObject()
at mx.managers::FocusManager/http://www.adobe.com/2006/flex/mx/internal::keyFocusChangeHandler()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocus()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocusToParent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusRequestMoveHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/setFocusToComponentHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers::FocusManager/setFocusToComponent()
at mx.managers::FocusManager/setFocusToNextObject()
at mx.managers::FocusManager/http://www.adobe.com/2006/flex/mx/internal::keyFocusChangeHandler()
at mx.managers.marshalClasses::FocusManagerMarshalMixin/moveFocus()

根据Adobe的"开发沙箱应用程序“指南，FocusManager应该能正常工作，甚至可以跨沙箱、多版本的应用程序运行。

有人看过这个吗？知道我可能错过了什么吗？

值得注意的是：

• 这个子应用程序正在加载到一个SWFLoader中，它被设置为使用一个单独的ApplicationDomain。
• 在顶级应用程序中，我根本不需要支持选项卡，但是当子应用程序中有可编辑的文本字段时，选项卡必须工作。而且，当有文本字段存在选项卡时，它工作得很好。

欢迎任何和所有建议。谢谢!

Answer 1

首先，您的堆栈跟踪似乎不包含在应用程序的scriptRecursionLimit=" 1000“中设置的默认1000行。我不知道您的代码限制是某种程度上的，还是沙箱可以在默认情况下以更严格的方式限制这一点。正如我所看到的，有些行没有重复，所以这可能意味着默认行为是正确的，但是由于一些限制，不能完成。

其次，如果您找不到修复它的好方法，可以使用一些解决方法：

try{
    dispatchTabPressEventThatCausesProblems();
}catch(e:Error){
    stage.focus = null;
}