使用try / catch進行評估拋出錯誤

Question

我有一個空中應用程序，用戶可以在文本區域中鍵入javascript，並在mx：HTML組件中進行評估，但是即使在eval中，在eval中的代碼周圍使用try / catch以及HTMLUncaughtScriptExceptionEvent處理程序，它仍然會引發錯誤。 htmlWindow是html.htmlLoader.window 。

try { htmlWindow.eval("try {" + script.text + "} catch (error:Error) { trace(error) }); } catch (error:Error) { trace(error) }

我在script輸入文字后，該行上的應用程序錯誤

ReferenceError: Can't find variable: d
    at Main/reloadHTML()[C:\Users\Christian\Adobe Flash Builder 4.5\JavaScript plus Scratch\src\Main.mxml:264]
    at Main/__script_change()[C:\Users\Christian\Adobe Flash Builder 4.5\JavaScript plus Scratch\src\Main.mxml:324]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at mx.core::UIComponent/dispatchEvent()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:13128]
    at spark.components.supportClasses::SkinnableTextBase/textDisplay_changeHandler()[E:\dev\4.5.1\frameworks\projects\spark\src\spark\components\supportClasses\SkinnableTextBase.as:2265]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at mx.core::UIComponent/dispatchEvent()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:13128]
    at spark.components::RichEditableText/textContainerManager_flowOperationCompleteHandler()[E:\dev\4.5.1\frameworks\projects\spark\src\spark\components\RichEditableText.as:4808]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at flashx.textLayout.container::TextContainerManager/dispatchEvent()[C:\Vellum\branches\v2\2.0\dev\output\openSource\textLayout\src\flashx\textLayout\container\TextContainerManager.as:1553]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at flashx.textLayout.elements::TextFlow/dispatchEvent()[C:\Vellum\branches\v2\2.0\dev\output\openSource\textLayout\src\flashx\textLayout\elements\TextFlow.as:859]
    at flashx.textLayout.edit::EditManager/finalizeDo()[C:\Vellum\branches\v2\2.0\dev\output\openSource\textLayout\src\flashx\textLayout\edit\EditManager.as:669]
    at flashx.textLayout.edit::EditManager/doOperation()[C:\Vellum\branches\v2\2.0\dev\output\openSource\textLayout\src\flashx\textLayout\edit\EditManager.as:613]
    at flashx.textLayout.edit::EditManager/flushPendingOperations()[C:\Vellum\branches\v2\2.0\dev\output\openSource\textLayout\src\flashx\textLayout\edit\EditManager.as:873]
    at flashx.textLayout.edit::SelectionManager/enterFrameHandler()[C:\Vellum\branches\v2\2.0\dev\output\openSource\textLayout\src\flashx\textLayout\edit\SelectionManager.as:1859]`

有什么辦法可以阻止錯誤？ 我試過script.change="html.htmlText = '<script>' + script.text + '</script'>" ，但是我有htmlWindow.log = log; htmlWindow.rotateSprite = rotateSprite; htmlWindow.log = log; htmlWindow.rotateSprite = rotateSprite; ，並且如果我在更改它之前復制粘貼log('test')可以正常工作，如果我在更改之前或之后進行更改，它將永遠無法工作，因此我希望此評估能夠正常工作。

Answer 1

我不確定您能否使此代碼100％無異常。 用戶可以編寫完全無效的代碼（例如zlçrza ;à"çé°$ ，該代碼不會引發異常，而只會使JS編譯器崩潰。您能否解釋為什么讓用戶直接鍵入javascript代碼？也許您需要通過其他方式解決此問題？