view.layer.cornerRadius = 25
view.layer.masksToBounds = true

extension UIView { func roundCorners(corners: UIRectCorner, radius: CGFloat) { let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) let mask = CAShapeLayer() mask.path = path.cgPath layer.mask = mask }
}

import SwiftUI
struct ContentView: View { var body: some View { Text("Hello, World!") .font(.largeTitle) .padding() .border(Color.blue, width: 2) .cornerRadius(10) }
}
struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() }
}

extension View { func cornerRadius(_ radius: CGFloat, corners: UIRectCorner) -> some View { clipShape( RoundedCorner(radius: radius, corners: corners) ) }
}

struct RoundedCorner: Shape { var radius: CGFloat = .infinity var corners: UIRectCorner = .allCorners func path(in rect: CGRect) -> Path { let path = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) return Path(path.cgPath) }
}

extension UIView { func roundCorners(corners: UIRectCorner, radius: CGFloat) { let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) let mask = CAShapeLayer() mask.path = path.cgPath layer.mask = mask }
}

struct CornerRadiusStyle: ViewModifier { var radius: CGFloat var corners: UIRectCorner struct CornerRadiusShape: Shape { var radius = CGFloat.infinity var corners = UIRectCorner.allCorners func path(in rect: CGRect) -> Path { let path = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) return Path(path.cgPath) } } func body(content: Content) -> some View { content .clipShape(CornerRadiusShape(radius: radius, corners: corners)) }
}
extension View { func cornerRadius(radius: CGFloat, corners: UIRectCorner) -> some View { ModifiedContent(content: self, modifier: CornerRadiusStyle(radius: radius, corners: corners)) }
}