Randomly generating SWFLoader source

Question

I want to create a view in flex that will display a randomly generated swf. the following code can run, but my swf isnt showing? how to fix this?

<fx:Script>
    <![CDATA[   
        public function random(url:String):String{
            var movieArray:Array = ['swf/maily_you', 'swf/maily_work', 'swf/maily_start'];
            var loader:Loader = new Loader(); 
            var index:int = movieArray.length * Math.random(); 
            var url:String = movieArray[index] + '.swf'; 
            trace("Attempting to load", url); 
            loader.load(new URLRequest(url));
            loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderComplete); 
            loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, loaderIOError); 
            addChild(loader); 
            function loaderComplete(e:Event):void {     
                trace("Successfully loaded", url);
            } function loaderIOError(e:IOErrorEvent):void {     
                trace("Failed to load", url); 
            }
    ]]>
</fx:Script>
<s:Panel width="100%" height="100%">
    <mx:SWFLoader  width="480" height="320" id="loader1" source="random()"/> 
</s:Panel>

Answer 1

In your posted code you have some little errors :

1. If you want that your random() function to set the source of your SWFLoader object, it should return the URL of the SWF and not use that as a parameter.

public function random():String 
{
    // ...

    return url;
}

---

2. I know that your are using a Loader object, maybe, for test purposes but you don't need that with an SWFLoader object.

---

3. To use a bindable data source (your random() function) in your MXML code, you can use :

The curly braces ({}) syntax :

<mx:SWFLoader width="480" height="320" id="loader1" source="{random()}"/>

The <fx:Binding> tag :

<fx:Binding 
    source="random()"
    destination="loader1.source"
/>
<mx:SWFLoader  width="480" height="320" id="loader1" source=""/>

---

So your final code can be like this :

<fx:Script>
    <![CDATA[   
        public function random():String 
        {
            var movieArray:Array = ['swf/maily_you', 'swf/maily_work', 'swf/maily_start'];
            var loader:Loader = new Loader(); 
            var index:int = movieArray.length * Math.random(); 
            var url:String = movieArray[index] + '.swf'; 
            return url;
        }
    ]]>     
</fx:Script>
<s:Panel width="100%" height="100%">
    <mx:SWFLoader  width="480" height="320" id="loader1" source="random()"/> 
</s:Panel>

For more, take a look on data binding.

Hope that can help.