Question

我在我的Flash应用中使用UrlLoader.load() 当发生未捕获的异常时，我正在处理UncaughtErrorEvent.UNCAUGHT_ERROR以停止应用
当您正常连接互联网时，UrlLoader.load()会正常工作但是，如果在您的浏览器加载应用程序后丢失了与互联网的连接，调用SecurityError时会发生UrlLoader.load()
我无法通过使用try catch捕获SecurityError并且UNCAUGHT_ERROR发生并且它会停止我的应用。

UrlLoader.load()失败时我不想停止应用，因为我只是使用UrlLoader.load()来记录一些不重要的信息。

而且我认为如果需要很长时间才能加载，也会出现超时错误由于超时错误，我也不想停止我的应用程序
我该如何解决这些问题呢？还有更多其他类型的错误可以发现并停止我的应用程序吗？

Answer 1

发生某种类型的安全违规时会抛出SecurityError异常。

安全错误示例：

An unauthorized property access or method call is made across a security sandbox boundary.
An attempt was made to access a URL not permitted by the security sandbox.
A socket connection was attempted to an unauthorized port number, e.g. a port above 65535.
An attempt was made to access the user’s camera or microphone, and the request to access the device was denied by the user.

让我们说我们必须从任何外部URL加载一个swf：

    // URL of the external movie content
    var myRequest:URLRequest=new URLRequest("glow2.swf");

    // Create a new Loader to load the swf files
    var myLoader:Loader=new Loader();

    // 1st level IO_ERROR input and output error checking
    // Listen error events for the loading process
    myLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioError);

    function ioError(event:ErrorEvent):void 
    {
      // Display error message to user in case of loading error.
         output_txt.text = "Sorry that there is an IO error during the loading of  an  
                            external movie. The error is:" + "\n" + event;
    }

    function checkComplete(evt:MouseEvent) 
    {
      // 2nd level SecurityError error checking
      // Use the try-catch block
      try
      {
         // Load the external movie into the Loader
         myLoader.load(myRequest);
      }
      catch (error:SecurityError) 
      {
         // catch the error here if any
         // Display error message to user in case of loading error.
            output_txt.text = "Sorry that there is a Security error during the 
                               loading of an external movie. The error is:" + "\n" +
                               error;
      }
    }

 movie1_btn.addEventListener(MouseEvent.CLICK, checkComplete);

 // Listen when the loading of movie (glow.swf) is completed
 myLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadMovie1);

 function loadMovie1(myEvent:Event):void 
 {
     // Display the Loader on the MainTimeline when the loading is completed
     addChild(myLoader);
     // Set display location of the Loader
     myLoader.x = 200;
     myLoader.y = 80;
 }

希望这对你有用。

如何在actionscript3中处理UrlLoader.load（）的安全错误和超时错误？

1 个答案: