[]Laya事件不能添加给多边形吗？

var clickRect = new Laya.Sprite();
clickRect.graphics.drawRect( 0, 0, Laya.stage.width, Laya.stage.height-100, "#ffffff" );
Laya.stage.addChild( clickRect );
clickRect.on( Laya.Event.CLICK, this, function(){ console.log( 'adf' ) } );