ClipToRoundView

ClipToRoundView.swift

@IBDesignable
final class ClipToRoundView: UIView {
    
    @IBInspectable
    var fillColor: UIColor = .white {
        didSet {
            shapeLayer.fillColor = fillColor.cgColor
        }
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        setPath()
    }
    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        setPath()
    }
    
    override class var layerClass: AnyClass {
        return CAShapeLayer.self
    }
    
    private var shapeLayer: CAShapeLayer {
        guard let shapeLayer = self.layer as? CAShapeLayer else { fatalError() }
        return shapeLayer
    }
    
    private func setPath() {
        shapeLayer.fillColor = fillColor.cgColor
        shapeLayer.fillRule = .evenOdd
        let maskPath = UIBezierPath(roundedRect: bounds, cornerRadius: bounds.height / 2)
        let path = UIBezierPath(rect: bounds)
        path.append(maskPath)
        shapeLayer.path = path.cgPath
    }
}