如何将圆角半径设置为 UIBezierPath

Question

我 UIBezierPath 使用此代码

创建了以下图像

    //// Bezier Drawing
    let bezierPath = UIBezierPath()
    bezierPath.move(to: CGPoint(x: 360, y: 0))
    bezierPath.addCurve(to: CGPoint(x: 360, y: 75), controlPoint1: CGPoint(x: 359.53, y: 30.5), controlPoint2: CGPoint(x: 359.91, y: 55.45))
    bezierPath.addCurve(to: CGPoint(x: 360, y: 153.78), controlPoint1: CGPoint(x: 360.35, y: 153.21), controlPoint2: CGPoint(x: 360, y: 153.78))
    bezierPath.addCurve(to: CGPoint(x: 180, y: 153.78), controlPoint1: CGPoint(x: 360, y: 153.78), controlPoint2: CGPoint(x: 271.2, y: 212.77))
    bezierPath.addCurve(to: CGPoint(x: 0, y: 153.78), controlPoint1: CGPoint(x: 88.8, y: 94.8), controlPoint2: CGPoint(x: 0, y: 153.78))
    bezierPath.addLine(to: CGPoint(x: 0, y: 0))
    bezierPath.addLine(to: CGPoint(x: 360, y: 0))
    UIColor.green.setFill()
    bezierPath.fill()

现在我想使用 Slider 为下一张图片的 TopLeft 和 TopRight 指定圆角半径。

我试过遵循代码，但它对我不起作用。

        var cornerPath = path

        cornerPath = UIBezierPath(roundedRect:self.imgTop.bounds,
                                          byRoundingCorners:[.topLeft, .topRight],
                                          cornerRadii: CGSize(width: CGFloat(cornerRadius),
                                                              height: CGFloat(cornerRadius)))

        path.lineWidth = 1.0

        let maskLayer = CAShapeLayer()
        maskLayer.path = cornerPath.cgPath
        self.imgTop.layer.mask = maskLayer

    let maskLayerTop = CAShapeLayer()
    maskLayerTop.fillColor = UIColor.white.cgColor
    maskLayerTop.backgroundColor = UIColor.clear.cgColor
    maskLayerTop.path = pathTop?.cgPath
    maskLayerTop.cornerRadius = CGFloat(cornerRadius)
    //maskLayerTop.masksToBounds = true

    maskLayerTop.shadowRadius = CGFloat(cornerRadius)
    maskLayerTop.fillColor = UIColor.green.cgColor
    maskLayerTop.shadowColor = UIColor.blue.cgColor

    imgTop.layer.mask = maskLayerTop

我也曾尝试将圆角半径应用于图像视图，但它并不work.i想要像下图那样的圆角半径。

请帮忙！ .

.

注意：我已经创建了一个路径来创建以下图像

Answer 1

在你的 let bezierPath = UIBezierPath() for curve add

之前

var = cornerRadiudSize = CGSize(width: 50.0, height: 50.0) //this is your global variable that you can change based on the slider and then draw
let p = UIBezierPath(roundedRect: rect, byRoundingCorners: .allCorners, cornerRadii: cornerRadiudSize)
p.addClip()

PS: 不是所有角都设置你想要的角

Answer 2

IOS14,swift5版本

let bezierPath = UIBezierPath(roundedRect: shareContainerView.bounds, byRoundingCorners: [.topLeft, .topRight], cornerRadii: CGSize(width: 4, height: 4))
let maskLayer = CAShapeLayer()
maskLayer.path = bezierPath.cgPath
shareContainerView.layer.mask = maskLayer

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