iOS Build a Simple iPhone App with Swift Getting Started with iOS Development Swift Recap Part 2

failing to initiate the override function well

can someone please assist me here. am failing to work on the override function better. the compiler is returning an error: method does not override any method from its superclass.

so I'm now lost

class Point {
  var x: Int
  var y: Int

  init(x: Int, y: Int) {
    self.x = x
    self.y = y

class Machine {
  var location: Point

  init() {
    self.location = Point(x: 0, y: 0)

  func move(_ direction: String) {
    print("Do nothing! I am a machine!")

// Enter your code below
enum Direction {
    case left
    case right
    case up
    case down

class Robot: Machine {
    var relocation: Point

   override init() {
        self.location = Point(x: 0, y: 0)

   override func moving(_ direction: Direction) {

        switch direction {
        case .up: location.y += 1
        case .down: location.y -= 1
        case .right: location.x += 1
        case .left: location.x -= 1
        default: return print(" no input")

1 Answer

Michael Hulet
Michael Hulet
Treehouse Moderator 47,665 Points

The only problem I think you have is that the overriding implementation is named differently than the method it overrides. In Swift, these need to be the same, otherwise they're considered different methods. Specifically, the method in Machine is named move, but the method in Robot is named moving. If you change one of them to have the same name as the other, it should work just fine