[]sprite添加click监听事件反应迟钝

代码如下，如果用drawyuan.graphics.drawCircle(0,0,50,"#232628");则会点击反应非常迟钝，如果用loadimg的话，反应很快；
function drawCirle()
{
var drawyuan = new Laya.Sprite();
// drawyuan.graphics.drawCircle(0,0,50,"#232628");//反应非常迟钝

drawyuan.loadImage("../laya/assets/comp/textinput.png");//反应没有问题

drawyuan.size(100, 100);
var x = Math.random() * Laya.stage.width;
var y = Math.random() * Laya.stage.height;
console.log(x + "" + y);
drawyuan.pos(x,y);
return drawyuan;

}