我试图通过@Output传递参数,但被激活的函数只是接收’undefined’.有人可以告诉我通过@Output的EventEmitter传递参数的方法吗？例如：

var childCmp = ng.core.Component({
             selector:'child-cmp',outputs: ['myEvent']
             }).Class({
               constructor: function(){
                            this.myEvent = new ng.core.EventEmitter();
                            this.myEvent.emit(false);
                            }
             });
var parentCmp = ng.core.Component({
              selector:'parent-cmp',template:'<child-cmp (myEvent)="invoke()"'></child-cmp>',directives: [childCmp]
           }).Class({
                constructor:function(){},invoke: function(flag){
                    // here flag is undefined!!
                }
             });

<child-cmp (myEvent)="invoke($event)"'></child-cmp>'