UIBezierPath 和 CAShapeLayer 绘画图纸

五角大楼画一个小圆圈戴：

- (void)drawPentagon{

//(1)UIBezierPath对象

UIBezierPath *aPath = [UIBezierPath bezierPath];

//開始点

[aPath moveToPoint:CGPointMake(100.0, 1.0)];

//划线点

[aPath addLineToPoint:CGPointMake(200.0, 40.0)];

[aPath addLineToPoint:CGPointMake(160, 140)];

[aPath addLineToPoint:CGPointMake(40.0, 140)];

[aPath addLineToPoint:CGPointMake(0.0, 40.0)];

[aPath closePath];

//设置定点是个5*5的小圆形（自己加的）

UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(100-5/2.0, 0, 5, 5)];

[aPath appendPath:path];

//（2）加到CAShapeLayer，效果出来了

CAShapeLayer *shapelayer = [CAShapeLayer layer];

//设置边框颜色

shapelayer.strokeColor = [[UIColor redColor]CGColor];

//设置填充颜色

shapelayer.fillColor = [[UIColor whiteColor]CGColor];

//就是这句话在关联彼此（UIBezierPath和CAShapeLayer）：

shapelayer.path = aPath.CGPath;

[self.view.layer addSublayer:shapelayer];

}