BeauNouvelle

public func autoRun() {
    DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
        self.world.updateCells()
        self.setNeedsDisplay()
        self.autoRun()
    }
}

BeauNouvelle

public override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    world.updateCells()
    setNeedsDisplay()
}

BeauNouvelle

switch livingNeighbors.count {
case 2...3 where cell.state == .alive:
    updatedCells.append(cell)
case 3 where cell.state == .dead:
    let liveCell = Cell(x: cell.x, y: cell.y, state: .alive)
    updatedCells.append(liveCell)
default:
    let deadCell = Cell(x: cell.x, y: cell.y, state: .dead)
    updatedCells.append(deadCell)
}

BeauNouvelle

default:
    let deadCell = Cell(x: cell.x, y: cell.y, state: .dead)
    updatedCells.append(deadCell)

BeauNouvelle

case 3 where cell.state == .dead:
    let liveCell = Cell(x: cell.x, y: cell.y, state: .alive)
    updatedCells.append(liveCell)

BeauNouvelle

let livingNeighbors = liveCells.filter { $0.isNeighbor(to: cell) }

BeauNouvelle

switch livingNeighbors.count {
case 2...3 where cell.state == .alive:
    updatedCells.append(cell)
}

BeauNouvelle

var updatedCells = [Cell]()
let liveCells = cells.filter { $0.state == .alive }

for cell in cells {

}

cells = updatedCells

BeauNouvelle

let view = WorldView(worldSize: 10, cellSize: 10)
PlaygroundPage.current.liveView = view

BeauNouvelle

for cell in world.cells {
  let rect = CGRect(x: cell.x * cellSize, y: cell.y * cellSize, width: cellSize, height: cellSize)
	let color = cell.state == .alive ? UIColor.green.cgColor : UIColor.white.cgColor
	context?.addRect(rect)
	context?.setFillColor(color)
	context?.fill(rect)
}