Css 在从if加载样式(或捕获错误)之前,如何测试SWF URL?
我试图使用以下代码从外部SWF加载样式,但当URL无效时,我不断收到ActionScript错误:Css 在从if加载样式(或捕获错误)之前,如何测试SWF URL?,css,apache-flex,url,actionscript,Css,Apache Flex,Url,Actionscript,我试图使用以下代码从外部SWF加载样式,但当URL无效时,我不断收到ActionScript错误: Error: Unable to load style(Error #2036: Load Never Completed. URL: http://localhost/css/styles.swf): ../css/styles.swf. at <anonymous>()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\
Error: Unable to load style(Error #2036: Load Never Completed. URL: http://localhost/css/styles.swf): ../css/styles.swf.
at <anonymous>()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\styles\StyleManagerImpl.as:858]
private function loadStyles(): void
{
try
{
var styleEvent:IEventDispatcher =
StyleManager.loadStyleDeclarations("../styles.swf");
styleEvent.addEventListener(StyleEvent.COMPLETE,
loadStyle_completeHandler);
styleEvent.addEventListener(StyleEvent.ERROR,
loadStyle_errorHandler);
}
catch (error:Error)
{
useDefault();
}
}
private function loadStyle_completeHandler(event:StyleEvent): void
{
IEventDispatcher(event.currentTarget).removeEventListener(
event.type, loadStyle_completeHandler);
goToNextStep();
}
private function loadStyle_errorHandler(event:StyleEvent): void
{
IEventDispatcher(event.currentTarget).removeEventListener(
event.type, loadStyle_errorHandler);
useDefault();
}
错误:无法加载样式(错误#2036:加载从未完成。URL:http://localhost/css/styles.swf):../css/styles.swf。
at()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\styles\StyleManagerImpl.as:858]
私有函数loadStyles():void
{
尝试
{
变量styleEvent:IEventDispatcher=
StyleManager.loadStyleDeclarations(“../styles.swf”);
styleEvent.addEventListener(styleEvent.COMPLETE,
loadStyle_completeHandler);
styleEvent.addEventListener(styleEvent.ERROR,
loadStyle_errorHandler);
}
捕获(错误:错误)
{
使用默认值();
}
}
私有函数loadStyle\u completeHandler(事件:StyleEvent):void
{
IEventDispatcher(event.currentTarget).removeEventListener(
event.type、loadStyle\u completeHandler);
goToNextStep();
}
私有函数loadStyle_errorHandler(事件:StyleEvent):void
{
IEventDispatcher(event.currentTarget).removeEventListener(
event.type、loadStyle\u errorHandler);
使用默认值();
}
我基本上想继续使用默认样式,而不让用户在无法加载此文件时看到错误-但我似乎找不到任何方法来执行此操作。有趣的问题。尝试删除removeEventListener调用,或对其进行注释;在我的简短测试中,事件处理程序似乎被调用了两次(我不知道为什么,尽管我怀疑这与样式继承有关),并且注释这一行就成功了
如果得到相同的结果,您可以尝试先检查侦听器(使用hasEventListener),然后再将其附加到loadStyles()函数中。希望有帮助 **不是答案,而是更新: 仅供参考,这是mx.styles.StyleManagerImpl源代码中的ActionScript代码,在调用StyleManager.loadStyleDeclarations()时运行。我运行调试器并在第858行(“抛出新错误(errorText);”)添加了一个断点,该断点被捕获。我认为不应该在那里捕获它,但是应该运行前面的IF(“IF(IF(styleEventDispatcher.willTrigger(StyleEvent.ERROR))”)
public function loadStyleDeclarations2(
url:String, update:Boolean = true,
applicationDomain:ApplicationDomain = null,
securityDomain:SecurityDomain = null):
IEventDispatcher
{
var module:IModuleInfo = ModuleManager.getModule(url);
var readyHandler:Function = function(moduleEvent:ModuleEvent):void
{
var styleModule:IStyleModule =
IStyleModule(moduleEvent.module.factory.create());
styleModules[moduleEvent.module.url].styleModule = styleModule;
if (update)
styleDeclarationsChanged();
};
module.addEventListener(ModuleEvent.READY, readyHandler,
false, 0, true);
var styleEventDispatcher:StyleEventDispatcher =
new StyleEventDispatcher(module);
var errorHandler:Function = function(moduleEvent:ModuleEvent):void
{
var errorText:String = resourceManager.getString(
"styles", "unableToLoad", [ moduleEvent.errorText, url ]);
if (styleEventDispatcher.willTrigger(StyleEvent.ERROR))
{
var styleEvent:StyleEvent = new StyleEvent(
StyleEvent.ERROR, moduleEvent.bubbles, moduleEvent.cancelable);
styleEvent.bytesLoaded = 0;
styleEvent.bytesTotal = 0;
styleEvent.errorText = errorText;
styleEventDispatcher.dispatchEvent(styleEvent);
}
else
{
throw new Error(errorText);
}
};
module.addEventListener(ModuleEvent.ERROR, errorHandler,
false, 0, true);
styleModules[url] =
new StyleModuleInfo(module, readyHandler, errorHandler);
// This Timer gives the loadStyleDeclarations() caller a chance
// to add event listeners to the return value, before the module
// is loaded.
var timer:Timer = new Timer(0);
var timerHandler:Function = function(event:TimerEvent):void
{
timer.removeEventListener(TimerEvent.TIMER, timerHandler);
timer.stop();
module.load(applicationDomain, securityDomain);
};
timer.addEventListener(TimerEvent.TIMER, timerHandler, false, 0, true);
timer.start();
return styleEventDispatcher;
}
我调试了源代码,发现错误事件被触发了两次。因此,我只需在第一次触发错误事件处理程序时设置一个标志,并在继续之前检查该标志的值是否为true:
private var isErrorTriggered:Boolean; // Default is false
private function loadStyle_completeHandler(event:StyleEvent):void
{
IEventDispatcher(event.currentTarget).removeEventListener(
event.type, loadStyle_completeHandler);
goToNextStep();
}
private function loadStyle_errorHandler(event:StyleEvent):void
{
if (isErrorTriggered)
return;
isErrorTriggered = true;
useDefault();
}