GridView.swift

struct GridView: View {
    
    var lineWidth: CGFloat = 1.5
    
    var color = Color(
        .displayP3,
        red: 225/255,
        green: 225/255,
        blue: 225/255,
        opacity: 1.0
    )
    var spacing: CGSize = CGSize(
        width: 48,
        height: 48
    )
    
    var body: some View {
        GeometryReader { geometry in
            Path { path in

                // Draw vertical grid lines
                for offsetX in stride(from: -lineWidth, to: geometry.size.width, by: self.spacing.width + lineWidth) {
                    path.move(to: CGPoint(x: offsetX, y: 0))
                    path.addLine(to: CGPoint(x: offsetX, y: geometry.size.height))
                }
                
                // Draw horizontal grid lines
                for offsetY in stride(from: 0, to: geometry.size.height, by: self.spacing.height) {
                    path.move(to: CGPoint(x: 0, y: offsetY))
                    path.addLine(to: CGPoint(x: geometry.size.height, y: offsetY))
                }
            }
            .stroke(color, lineWidth: lineWidth)
        }
    }
}