绘制圆角相交线

cornerRadius 但是我不知道怎么做才好。

我有以下代码来绘制带边框的选项卡:

private func drawBorder(selectedTab: UIButton) {
        // The Tab frame (below one)
        guard let tabContainerFrame = vTabContainer?.frame else { return }

        let borderColor = selectedTab.titleColor(for: .selected)

        let tabFrame = selectedTab.convert(selectedTab.bounds, to: self)
        let topMargin: CGFloat = 5
        let tabOrigin = CGPoint(x: tabFrame.origin.x, y: tabFrame.origin.y - topMargin)

        // Make paths to draw
        let path = UIBezierPath()

        path.move(to: tabOrigin) // Origin (top left)
        path.addLine(to: CGPoint(x: tabFrame.maxX, y: tabOrigin.y)) // -> right
        path.addLine(to: CGPoint(x: tabFrame.maxX, y: tabFrame.maxY)) // -> down

        if tabFrame.maxX != tabContainerFrame.maxX {
            path.addLine(to: CGPoint(x: tabContainerFrame.maxX, y: tabContainerFrame.origin.y)) // -> right
        }

        path.addLine(to: CGPoint(x: tabContainerFrame.maxX, y: tabContainerFrame.maxY)) // -> Down
        path.addLine(to: CGPoint(x: tabContainerFrame.origin.x, y: tabContainerFrame.maxY)) // -> left
        path.addLine(to: CGPoint(x: tabContainerFrame.origin.x, y: tabContainerFrame.origin.y)) // -> up

        if tabOrigin.x != tabContainerFrame.origin.x {
            path.addLine(to: CGPoint(x: tabOrigin.x, y: tabContainerFrame.origin.y)) // -> right
        }

        // Close the path. This will create the last line automatically.
        path.close()

        // Draw
        let borderLayer = CAShapeLayer()
        borderLayer.path = path.cgPath
        borderLayer.lineCap = kCALineCapRound
        borderLayer.lineJoin = kCALineJoinBevel
        borderLayer.fillColor = UIColor.clear.cgColor
        borderLayer.strokeColor = borderColor?.cgColor
        borderLayer.cornerRadius = 10
        borderLayer.lineWidth = 2
        layer.addSublayer(borderLayer)

        self.borderLayer = borderLayer
    }

结果如下:

如你所见,尽管我补充 cornerRadius = 10 ,就是不行。 borderLayer.lineCap = kCALineCapRound 和 borderLayer.lineJoin = kCALineJoinBevel 也没用。

奖金:

我想有一个方法来实现动态 @IBInspectable var lineCornerRadius: CGFloat = 10 .