在flex里通过addEventListener函数给控件动态加载click事件侦听函数时,除了事件本身传递的Event类型参数外,还需要传递更多的参数,代码如下:
package
{
public class EventArgExtend
{
public function EventArgExtend()
{
}
public static function create(f:Function,... arg):Function
{
var F:Boolean=false;
var _f:Function=function(e:*,..._arg)
{
_arg=arg
if(!F)
{
F=true
_arg.unshift(e)
}
f.apply(null,_arg)
};
return _f;
}
public static function toString():String
{
return "Class JEventDelegate";
}
}
}
使用的方式:
txtShow.addEventListener(MouseEvent.CLICK,EventArgExtend.create(clickHandler,1,"str"));
private function clickHandler(e:Event,...arg):void
{
Alert.show(arg[0].toString());
Alert.show(arg[1].toString());
}
还有另外一个方法,没有封装效果,不过代码更加容易理解:
var sayHello:String = "123456";
btn1.addEventListener(MouseEvent.CLICK,function (e:MouseEvent){clickHandlerWithArg(e,sayHello)});
function clickHandlerWithArg(e:MouseEvent,arg:String):void
{
var out:String= e.target + "发出事件(有参数) :" + arg;
trace(out);
}