Flex加载flash_as3_swf,并响应其中的按钮事件

注：flash_as3_swf里的源码里有一个btn_function的空function，需要从flex中传入，当flash里的按钮被点击的时候，会调用传入的flashBtnFun并传入参数cityName(也是flash里btn的name)，这样flex中就能得到cityName，并侦测到function调用

(1)<mx:SWFLoader id="loader" source="dituNav.swf" complete="onComplete(event)" width="100%" height="100%"/>

(2)private function onComplete(evt:Event):void
???{
????var swfObj:Object = Object(SWFLoader(evt.currentTarget).content);
?????Object(swfObj).btn_function = flashBtnFun;
???}

(3)private function flashBtnFun(cityName:String):void???{????if(_currCity!="" && _currCity!=cityName)????{?????if(loader.content[_currCity])?????{??????DisplayObject(loader.content[_currCity]).alpha = 0;?????}????}??????_currCity = cityName;????if(loader.content[_currCity])????{?????DisplayObject(loader.content[_currCity]).alpha = 1;????}????//根据得到的导航里的buttonName，做相应的处理????ExternalInterface.call("getCurrentCity",_currCity);???}