1、设置下你graphics线条的显示对象的pivot,也就是线条的中心点
2、然后针对你的显示对象进行rotate旋转
private function createTexts():void
{
var sp:Sprite=new Sprite();
Laya.stage.addChild(sp);
sp.graphics.drawLine(0,0,200,200,'#FF00000');
sp.pivot(0,0);
Laya.timer.frameLoop(1,this,onTimer,[sp]);
}
private function onTimer(sp:Sprite):void
{
sp.rotation+=1;
}