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

Diego Salas Polar
Diego Salas Polar
16,296 Points

I don't know what I am doing wrong with my code. Could somebody please help?

:)

test.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) {
        // Enter your code below

        switch direction {
        case .left: self.location.x -= 1
        case .right: self.location.x+=1
        case .down: self.location.y -= 1
        case .up: self.location.y += 1
        }
}

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points

You don't need self

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 .up:
            location.y += 1
        case .down:
            location.y -= 1
        case .right:
            location.x += 1
        case .left:
            location.x -= 1

        }
    }
}