GridTest.swift

//
//  GridTest.swift
//

import SwiftUI

struct GridTest: View {
  var items: [String]
    
  var body: some View {
    NavigationView {
      List {
        ForEach(0..<3) { index in
          GeometryReader { geometry in
            HStack {
              self.items[safe: index * 2]
                .map {
                  Text($0)
                    .frame(width: geometry.size.width / 2, height: geometry.size.width / 2)
                }
              self.items[safe: index * 2 + 1]
                .map {
                  Text($0)
                    .frame(width: geometry.size.width / 2, height: geometry.size.width / 2)
                }
            }
          }
        }
      }
        .listStyle(.grouped)
        .navigationBarTitle("Grid Test", displayMode: .inline)
    }
  }
}

#if DEBUG
struct GridTest_Previews: PreviewProvider {
  static var previews: some View {
    GridTest(items: [ "First Label", "Second Label", "Third Label", "Fourth Label", "Fifth Label" ])
  }
}
#endif


extension Collection {
  subscript(safe index: Index) -> Iterator.Element? {
    guard index >= startIndex && index < endIndex else { return nil }
    return self[index]
  }
}