使用CAShapeLayer绘制镂空的图层

结合上面两篇，做一个镂空的图层--》可用于app内的新手指引-----直接上代码：

在markView.m里面的代码如下：

UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0,0,self.bounds.size.width, self.bounds.size.height)cornerRadius:0];

    UIBezierPath *circlePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(rect.origin.x,rect.origin.y,rect.size.width,rect.size.height)cornerRadius:radius];

    [path appendPath:circlePath];

    [path setUsesEvenOddFillRule:YES];

    

   fillLayer = [CAShapeLayer layer];

    

    fillLayer.path = path.CGPath;

    fillLayer.fillRule =kCAFillRuleEvenOdd;

    fillLayer.fillColor = [UIColor blackColor].CGColor;

    fillLayer.opacity =0.8;

    

    [self.layer addSublayer:fillLayer];

 

效果图：