[]lineStyle()没有清除描边效果

var s:Shape = new Shape();

s.graphics.lineStyle(4);

s.graphics.beginFill(0xff0000);

s.graphics.drawCircle(100, 100, 70);

s.graphics.endFill();

s.graphics.lineStyle();//flash中不加参数是清除描边效果

s.graphics.beginFill(0xffffff);

s.graphics.drawCircle(100, 100, 50);

s.graphics.endFill();

addChild(s);