How to handle error dialog boxes in ActionScripts 3 - actionscript-3

Question

I write some code to check an XML from a URL, it works when Internet connection exist, but when i manually disable internet for test an Error dialog box show, i coudn't handle it with try() catch().
try {
var myXML: XML = new XML();
var XML_URL: String = "https://drive.google.com/uc?export=download&id=0B5pkl4TJ7V0OTFBPanUyMWQxUnM";
var myXMLURL: URLRequest = new URLRequest(XML_URL);
var myLoader: URLLoader = new URLLoader(myXMLURL);
myLoader.addEventListener(Event.COMPLETE, xmlLoaded);
function xmlLoaded(event: Event): void {
myXML = XML(myLoader.data);
trace("LOCK CODE: " + myXML.LOCK);
if (myXML.LOCK == 0) {
gotoAndStop(71);
};
}
} catch (e: Error) {
gotoAndStop(71);
trace("FAILED TO CHECK LOCK.");
} finally {
gotoAndStop(71);
trace("FAILED TO CHECK LOCK.");
}
How can i hide this dialog from user?

Answer 1

Add an URLLoader event listener for IOErrorEvent.IO_ERROR
e.g.
myLoader.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
function ioErrorHandler(event:IOErrorEvent):void {
trace("ioErrorHandler: " + event);
}
You should handle all events as good measure anyway (e.g. security error, etc.)
The as3 docs example provides a helpful snippet
Ideally you would not only silently trace message, but hopefully display helpful feedback or placeholder content for the user to understand what to expect.