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

Posted by Elijah Florence
Elijah Florence
Courses Plus Student 3,225 Points

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?

classes.swift 
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
28,693 Points
Simon Coates
Simon Coates
28,693 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--
    }