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iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enums and Objects

Why can instance member 'y' not be used on type Point?

Is there another way to call the x and y coordinates I should be using?

class Point {
    var x: Int
    var y: Int

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

enum Direction {
    case Left 
    case Right
    case Up
    case Down

class Robot {
    var location: Point

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

    func move(direction: Direction) {
    switch direction
    case Direction.Up: Point.y++
    case Direction.Down: Point.y--
    case Direction.Right: Point.x++
    case Direction.Left: Point.x--
        // Enter your code below

1 Answer

Simon Coates
Simon Coates
28,694 Points

the following seemed to pass. I don't think you're operating on an instance.

  switch direction
    case Direction.Up: self.location .y++
    case Direction.Down: self.location .y--
    case Direction.Right: self.location .x++
    case Direction.Left: self.location .x--