绘制自定义矩形

Question

我想制作一个顶部有两个角半径的矩形。但是 rectangle() 方法不支持。

我也试过 GeometryReader 但不能正常工作。

Answer 1

我在这个 article 中为此写了一个例子。最后一个例子就是这样做的。答案确实是 GeometryReader。如果您在运行时遇到问题，post 请在此处提供您的代码，以便我们为您提供帮助。

更新

以下是如何重现您在评论中包含的图片：

struct ContentView : View {
    var body: some View {        
        RoundedCorners(color: .black, tl: 35, tr: 35).frame(height: 200)
    }
}

struct RoundedCorners: View {
    var color: Color = .black
    var tl: CGFloat = 0.0
    var tr: CGFloat = 0.0
    var bl: CGFloat = 0.0
    var br: CGFloat = 0.0

    var body: some View {
        GeometryReader { geometry in
            Path { path in

                let w = geometry.size.width
                let h = geometry.size.height

                // We make sure the redius does not exceed the bounds dimensions
                let tr = min(min(self.tr, h/2), w/2)
                let tl = min(min(self.tl, h/2), w/2)
                let bl = min(min(self.bl, h/2), w/2)
                let br = min(min(self.br, h/2), w/2)

                path.move(to: CGPoint(x: w / 2.0, y: 0))
                path.addLine(to: CGPoint(x: w - tr, y: 0))
                path.addArc(center: CGPoint(x: w - tr, y: tr), radius: tr, startAngle: Angle(degrees: -90), endAngle: Angle(degrees: 0), clockwise: false)
                path.addLine(to: CGPoint(x: w, y: h - br))
                path.addArc(center: CGPoint(x: w - br, y: h - br), radius: br, startAngle: Angle(degrees: 0), endAngle: Angle(degrees: 90), clockwise: false)
                path.addLine(to: CGPoint(x: bl, y: h))
                path.addArc(center: CGPoint(x: bl, y: h - bl), radius: bl, startAngle: Angle(degrees: 90), endAngle: Angle(degrees: 180), clockwise: false)
                path.addLine(to: CGPoint(x: 0, y: tl))
                path.addArc(center: CGPoint(x: tl, y: tl), radius: tl, startAngle: Angle(degrees: 180), endAngle: Angle(degrees: 270), clockwise: false)
            }
            .fill(self.color)
        }
    }
}

绘制自定义矩形

Drawing a custom rectangle

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