Разные cornerRadius для каждого угла Swift 3 - iOS

Ответ 1

Вы можете установить значение по умолчанию layer.cornerRadius на наименьшее значение, а затем установить границу маски слоя на большее значение.

let demoView = UIView(frame: CGRect(x: 100, y: 200, width: 100, height: 100))
demoView.backgroundColor = UIColor.red
demoView.layer.cornerRadius = 3.0

let maskPath = UIBezierPath(roundedRect: demoView.bounds,
                            byRoundingCorners: [.topLeft, .topRight, .bottomLeft],
                            cornerRadii: CGSize(width: 18.0, height: 0.0))

let maskLayer = CAShapeLayer()
maskLayer.path = maskPath.cgPath
demoView.layer.mask = maskLayer
view.addSubview(demoView)

Ответ 2

Хотите добавить уникальное значение угла для каждого угла?

Вы хотите добавить границу после этого?

У меня есть решение будет выглядеть так:

Сначала, добавьте расширение UIBezierPath, которое я сделал:

extension UIBezierPath {
    convenience init(shouldRoundRect rect: CGRect, topLeftRadius: CGSize = .zero, topRightRadius: CGSize = .zero, bottomLeftRadius: CGSize = .zero, bottomRightRadius: CGSize = .zero){

        self.init()

        let path = CGMutablePath()

        let topLeft = rect.origin
        let topRight = CGPoint(x: rect.maxX, y: rect.minY)
        let bottomRight = CGPoint(x: rect.maxX, y: rect.maxY)
        let bottomLeft = CGPoint(x: rect.minX, y: rect.maxY)

        if topLeftRadius != .zero{
            path.move(to: CGPoint(x: topLeft.x+topLeftRadius.width, y: topLeft.y))
        } else {
            path.move(to: CGPoint(x: topLeft.x, y: topLeft.y))
        }

        if topRightRadius != .zero{
            path.addLine(to: CGPoint(x: topRight.x-topRightRadius.width, y: topRight.y))
            path.addCurve(to:  CGPoint(x: topRight.x, y: topRight.y+topRightRadius.height), control1: CGPoint(x: topRight.x, y: topRight.y), control2:CGPoint(x: topRight.x, y: topRight.y+topRightRadius.height))
        } else {
             path.addLine(to: CGPoint(x: topRight.x, y: topRight.y))
        }

        if bottomRightRadius != .zero{
            path.addLine(to: CGPoint(x: bottomRight.x, y: bottomRight.y-bottomRightRadius.height))
            path.addCurve(to: CGPoint(x: bottomRight.x-bottomRightRadius.width, y: bottomRight.y), control1: CGPoint(x: bottomRight.x, y: bottomRight.y), control2: CGPoint(x: bottomRight.x-bottomRightRadius.width, y: bottomRight.y))
        } else {
            path.addLine(to: CGPoint(x: bottomRight.x, y: bottomRight.y))
        }

        if bottomLeftRadius != .zero{
            path.addLine(to: CGPoint(x: bottomLeft.x+bottomLeftRadius.width, y: bottomLeft.y))
            path.addCurve(to: CGPoint(x: bottomLeft.x, y: bottomLeft.y-bottomLeftRadius.height), control1: CGPoint(x: bottomLeft.x, y: bottomLeft.y), control2: CGPoint(x: bottomLeft.x, y: bottomLeft.y-bottomLeftRadius.height))
        } else {
            path.addLine(to: CGPoint(x: bottomLeft.x, y: bottomLeft.y))
        }

        if topLeftRadius != .zero{
            path.addLine(to: CGPoint(x: topLeft.x, y: topLeft.y+topLeftRadius.height))
            path.addCurve(to: CGPoint(x: topLeft.x+topLeftRadius.width, y: topLeft.y) , control1: CGPoint(x: topLeft.x, y: topLeft.y) , control2: CGPoint(x: topLeft.x+topLeftRadius.width, y: topLeft.y))
        } else {
            path.addLine(to: CGPoint(x: topLeft.x, y: topLeft.y))
        }

        path.closeSubpath()
        cgPath = path
    }
}

Затем добавьте это расширение UIView:

extension UIView{
    func roundCorners(topLeft: CGFloat = 0, topRight: CGFloat = 0, bottomLeft: CGFloat = 0, bottomRight: CGFloat = 0) {//(topLeft: CGFloat, topRight: CGFloat, bottomLeft: CGFloat, bottomRight: CGFloat) {
        let topLeftRadius = CGSize(width: topLeft, height: topLeft)
        let topRightRadius = CGSize(width: topRight, height: topRight)
        let bottomLeftRadius = CGSize(width: bottomLeft, height: bottomLeft)
        let bottomRightRadius = CGSize(width: bottomRight, height: bottomRight)
        let maskPath = UIBezierPath(shouldRoundRect: bounds, topLeftRadius: topLeftRadius, topRightRadius: topRightRadius, bottomLeftRadius: bottomLeftRadius, bottomRightRadius: bottomRightRadius)
        let shape = CAShapeLayer()
        shape.path = maskPath.cgPath
        layer.mask = shape
    }
}

Наконец,, вызов метода

myView.roundCorners(topLeft: 10, topRight: 20, bottomLeft: 30, bottomRight: 40)

И добавь границу. Очевидно, layer.borderRadius не будет работать должным образом, поэтому создайте границу, используя CAShapeLayer и ранее созданный путь.

let borderLayer = CAShapeLayer()
borderLayer.path = (myView.layer.mask! as! CAShapeLayer).path! // Reuse the Bezier path
borderLayer.strokeColor = UIColor.red.cgColor
borderLayer.fillColor = UIColor.clear.cgColor
borderLayer.lineWidth = 5
borderLayer.frame = myView.bounds
myView.layer.addSublayer(borderLayer)

Вуаля!