绘制一个带有一些阴影偏移的圆边平行四边形

Question

我想画一个圆边的平行四边形。我希望它是可配置的，以便我可以将垂直边缘之一设为 90 度。

As you can see in the image that topLeft corner is not rounded with code below

func getParallelogram(width: CGFloat, height: CGFloat, radius: CGFloat) -> CGPath {
        // Points of the parallelogram
        var points = [
            CGPoint(x: width * 0.05, y: 0),
            CGPoint(x: width , y: 0),
            CGPoint(x: width - width * 0.05, y: height),
            CGPoint(x: 0, y: height)
        ]

        let point1 = points[0]
        let point2 = points[1]
        let point3 = points[2]
        let point4 = points[3]

        let path = CGMutablePath()

        path.move(to: point1)
        path.addArc(tangent1End: point1, tangent2End: point2, radius: radius)
        path.addArc(tangent1End: point2, tangent2End: point3, radius: radius)
        path.addArc(tangent1End: point3, tangent2End: point4, radius: radius)
        path.addArc(tangent1End: point4, tangent2End: point1, radius: radius)
        return path
    }

用法：

let customView = UIView(frame: CGRect(x: 20, y: 50, width: 320, height: 300))
customView.backgroundColor = UIColor.clear
view.addSubview(customView)

let shape = CAShapeLayer()
shape = UIColor.lightGray.cgColor
shape.path = getParallelogram(width: 200, height: 80, radius: 5)
shape.position = CGPoint(x: 10, y: 10)
shape.layer.addSublayer(triangle)

我在这里面临的问题是使用上述代码时左上角不是圆的。我将不胜感激任何帮助来实现这一目标。如果有任何其他替代或更简单的方法，也请指导我。谢谢！

注意：我正在使用此代码将三角形转换为平行四边形 UIBezierPath Triangle with rounded edges

Answer 1

改变

    path.move(to: point1)
    path.addArc(tangent1End: point1, tangent2End: point2, radius: radius)
    path.addArc(tangent1End: point2, tangent2End: point3, radius: radius)
    path.addArc(tangent1End: point3, tangent2End: point4, radius: radius)
    path.addArc(tangent1End: point4, tangent2End: point1, radius: radius)

至

    path.move(to: point1)
    path.addArc(tangent1End: point2, tangent2End: point3, radius: radius)
    path.addArc(tangent1End: point3, tangent2End: point4, radius: radius)
    path.addArc(tangent1End: point4, tangent2End: point1, radius: radius)
    path.addArc(tangent1End: point1, tangent2End: point2, radius: radius)

结果：

绘制一个带有一些阴影偏移的圆边平行四边形

Draw a round edge parallelogram with some shadow offset

core-graphics

ios

swift