ios - 如何只为 topLeft 和 bottomLeft 角设置圆角？

Question

我关注了其他 stackoverflow 线程并创建了 CAShapeLayer 并将其添加到按钮层。

let bazierPath = UIBezierPath.init(roundedRect: button.bounds, byRoundingCorners: [UIRectCorner.bottomLeft, UIRectCorner.topLeft], cornerRadii: CGSize(width: 10.0, height: 10.0 ))
            let shapeLayer = CAShapeLayer()
            shapeLayer.frame = button.bounds
            shapeLayer.path = bazierPath.cgPath
            shapeLayer.strokeColor = UIColor.green.cgColor
            shapeLayer.lineWidth = 1.0
            button.layer.mask = shapeLayer

但问题是我得到了颜色清晰的角，但我希望它们是绿色的。检查下图中带有“Mon”和“Fri”的按钮，以便清楚地了解问题。

Answer 1

在您的代码中，您忘记将 addSublayer 添加到主层 contentView.layer.addSublayer(subLayer) 以用于示例目的

  let contentView = UIView(frame: CGRect(x: CGFloat(50), y: CGFloat(100), width: CGFloat(200), height: CGFloat(100)))
    self.view.addSubview(contentView)
    let subLayer = CAShapeLayer()
    subLayer.fillColor = UIColor.blue.cgColor
    subLayer.strokeColor = UIColor.green.cgColor
    subLayer.lineWidth = 1.0
    subLayer.path = UIBezierPath(roundedRect: contentView.bounds, byRoundingCorners: [UIRectCorner.bottomLeft, UIRectCorner.topLeft], cornerRadii: CGSize(width: 10.0, height: 10.0 )).cgPath
    contentView.layer.addSublayer(subLayer)

输出