使用变换动画重新绘制聚焦环蒙版

Question

我的应用程序具有NSImageView子类，具有拖放功能，框样式和悬停动画。但是我有一个我无法解决的问题。悬停动画包含在layer.transform比例中，一切都很好，但是聚焦环蒙版没有改变其比例，如我在下一张图片中所示：

Problem with transform animation and focus ring mask

我尝试了一个没有运气的覆盖drawfocusringmask（）：/

动画代码是这样的：

func animateOnHover(layer: CALayer, duration: CFTimeInterval, fromValue: CGFloat, toValue: CGFloat) {



        // Set the anchorpoint to the center of the NSImageView and animates from there
        let frame = layer.frame
        let center = CGPoint(x: frame.midX, y: frame.midY)
        layer.position = center
        layer.anchorPoint = CGPoint(x: 0.5, y: 0.5)


        //Set the animation
        let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")

        CATransaction.begin()
        scaleAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
        scaleAnimation.duration = duration
        scaleAnimation.fromValue = fromValue
        scaleAnimation.toValue = toValue
        layer.add(scaleAnimation, forKey: "scale")
        CATransaction.commit()


        layer.transform = CATransform3DMakeScale(toValue , toValue, 0)

    }

macOS 10.11 迅捷3.2 XCode 8.2.1