Determining when a UILoader component has completed loading in Flash using ActionScript 3.0

// ActionScript 3.0
/* Requires:
 * - UILoader control in Library
 */
 
import fl.containers.UILoader;
 
var urlReq:URLRequest = new URLRequest();
urlReq.url = "http://helpexamples.com/flash/images/image1.jpg";
 
var uiLoader:UILoader = new UILoader();
uiLoader.addEventListener(Event.COMPLETE, uiLoader_complete);
uiLoader.load(urlReq);
uiLoader.move(10, 10);
addChild(uiLoader);
 
var tf:TextField;
 
function uiLoader_complete(evt:Event):void {
    tf = new TextField();
    tf.text = evt.type;
    addChild(tf)
}