Simple grid for SwiftUI

GridView.swift

//
//  GridView.swift
//  GridView
//
//  Created by Dmytro Anokhin on 19/08/2021.
//

import SwiftUI

struct GridView: View {

    var length: CGFloat = 100.0

    var body: some View {
        GeometryReader { proxy in
            ZStack {
                path(size: proxy.size, length: length * 0.25)
                    .stroke(style: StrokeStyle(lineWidth: 0.5))
                    .foregroundColor(Color(.displayP3, white: 0.75, opacity: 1.0))

                path(size: proxy.size, length: length)
                    .stroke(style: StrokeStyle(lineWidth: 0.25))
                    .foregroundColor(Color(.displayP3, white: 0.25, opacity: 1.0))
            }
            .background(Color.white)
            // .drawingGroup()
        }
    }

    func path(size: CGSize, length: CGFloat) -> Path {
        Path { path in
            var x = length

            while x < size.width {
                path.move(to: CGPoint(x: x, y: 0.0))
                path.addLine(to: CGPoint(x: x, y: size.height))

                x += length
            }

            var y = length

            while y < size.height {
                path.move(to: CGPoint(x: 0.0, y: y))
                path.addLine(to: CGPoint(x: size.width, y: y))

                y += length
            }
        }
    }
}

struct GridView_Previews: PreviewProvider {
    static var previews: some View {
        GridView()
    }
}