今天在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，在网上找了一段代码，用起来还不错，张贴到这里。
Java代码 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" ; } } } 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：
Java代码 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()); } 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：
Java代码 var sayHello:String = "欢迎光临www.FlashJ.cn -Flash,Ria技术博客" ; 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); } var sayHello:String = "欢迎光临www.FlashJ.cn -Flash,Ria技术博客"; 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); }
转自：http://pengranxiang.javaeye.com/blog/640536
