Check component initilaze before add events in actionscript 3

if (_myComponent != null)
{
    // add listeners
}

if (mcWithComponents.stage) doStuff();
mcWithComponents.addEventListener(Event.ADDED_TO_STAGE, doStuff);

private function doStuff(e:Event = null):void
{
    mcWithComponents.myButton.addEventListener(MouseEvent.CLICK, buttonClicked);
}

public function mcWithComponents() // constructor
{
    if (stage) init();
    addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
  myButton.addEventListener(MouseEvent.CLICK, buttonClicked);
}