在 SwiftUI Mac 应用程序中圆化特定角

Question

我一直在尝试弄清楚如何在 Mac 应用 中圆化 SwiftUI View 的特定角。我能找到的所有解决方案（诸如此类）仅适用于 iOS，因为它有 UIRectCorner。我找不到 NSRectCorner 等效项。

过去，我会像这样圆化 NSView 的特定角：

layer?.cornerRadius = 5
layer?.maskedCorners = .layerMinXMinYCorner //Bottom-left corner

有没有人找到一种方法在 SwiftUI 中的 Mac 应用程序中圆化特定角？

Answer 1

这是 ma​​cOS 的答案:)

// defines OptionSet, which corners to be rounded – same as UIRectCorner
struct RectCorner: OptionSet {
    
    let rawValue: Int
        
    static let topLeft = RectCorner(rawValue: 1 << 0)
    static let topRight = RectCorner(rawValue: 1 << 1)
    static let bottomRight = RectCorner(rawValue: 1 << 2)
    static let bottomLeft = RectCorner(rawValue: 1 << 3)
    
    static let allCorners: RectCorner = [.topLeft, topRight, .bottomLeft, .bottomRight]
}


// draws shape with specified rounded corners applying corner radius
struct RoundedCornersShape: Shape {
    
    var radius: CGFloat = .zero
    var corners: RectCorner = .allCorners

    func path(in rect: CGRect) -> Path {
        var path = Path()

        let p1 = CGPoint(x: rect.minX, y: corners.contains(.topLeft) ? rect.minY + radius  : rect.minY )
        let p2 = CGPoint(x: corners.contains(.topLeft) ? rect.minX + radius : rect.minX, y: rect.minY )

        let p3 = CGPoint(x: corners.contains(.topRight) ? rect.maxX - radius : rect.maxX, y: rect.minY )
        let p4 = CGPoint(x: rect.maxX, y: corners.contains(.topRight) ? rect.minY + radius  : rect.minY )

        let p5 = CGPoint(x: rect.maxX, y: corners.contains(.bottomRight) ? rect.maxY - radius : rect.maxY )
        let p6 = CGPoint(x: corners.contains(.bottomRight) ? rect.maxX - radius : rect.maxX, y: rect.maxY )

        let p7 = CGPoint(x: corners.contains(.bottomLeft) ? rect.minX + radius : rect.minX, y: rect.maxY )
        let p8 = CGPoint(x: rect.minX, y: corners.contains(.bottomLeft) ? rect.maxY - radius : rect.maxY )

        
        path.move(to: p1)
        path.addArc(tangent1End: CGPoint(x: rect.minX, y: rect.minY),
                    tangent2End: p2,
                    radius: radius)
        path.addLine(to: p3)
        path.addArc(tangent1End: CGPoint(x: rect.maxX, y: rect.minY),
                    tangent2End: p4,
                    radius: radius)
        path.addLine(to: p5)
        path.addArc(tangent1End: CGPoint(x: rect.maxX, y: rect.maxY),
                    tangent2End: p6,
                    radius: radius)
        path.addLine(to: p7)
        path.addArc(tangent1End: CGPoint(x: rect.minX, y: rect.maxY),
                    tangent2End: p8,
                    radius: radius)
        path.closeSubpath()

        return path
    }
}

// View extension, to be used like modifier:
// SomeView().roundedCorners(radius: 20, corners: [.topLeft, .bottomRight])
extension View {
    func roundedCorners(radius: CGFloat, corners: RectCorner) -> some View {
        clipShape( RoundedCornersShape(radius: radius, corners: corners) )
    }
}

Answer 2

创建自定义形状

import SwiftUI

struct RoundCorner: Shape {
    
    // MARK: - PROPERTIES
    
    var cornerRadius: CGFloat
    var maskedCorners: UIRectCorner
    
    
    // MARK: - PATH
    
    func path(in rect: CGRect) -> Path {
        let path = UIBezierPath(roundedRect: rect, byRoundingCorners: maskedCorners, cornerRadii: CGSize(width: cornerRadius, height: cornerRadius))
        return Path(path.cgPath)
    }
}

// MARK: - PREVIEW

struct RoundCorner_Previews: PreviewProvider {
    static var previews: some View {
        RoundCorner(cornerRadius: 20, maskedCorners: .allCorners)
    }
}

并将该形状应用到您的视图

import SwiftUI

struct SwiftUIView: View {
    
    // MARK: - BODY
    
    var body: some View {
        Text("Hello, World!")
            .padding()
            .background(
                Color.orange
            )
            .clipShape(
                RoundCorner(
                    cornerRadius: 12,
                    maskedCorners: [.topLeft, .bottomRight]
                )//OUR CUSTOM SHAPE
            )
    }
}

// MARK: - PREVIEW

struct SwiftUIView_Previews: PreviewProvider {
    static var previews: some View {
        SwiftUIView()
    }
}