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

michaellesniak
michaellesniak
10,443 Points
Posted by michaellesniak
michaellesniak
10,443 Points

Stuck

Code Challenge two for Enumeration and Optionals

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) -> Point {
        // Enter your code below
        switch direction {
        case .up: return Point(x: 0, y: 1)
        case .down: return Point(x: 0, y: -1)
        case .right: return Point(x: 1, y: 0)
        case .left: return Point(x: -1, y: 0)
        default: return Point(x: 0, y: 0)
    }
}

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points

Here is how you would complete this challenge; let me know if you need further explanation

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

        }
    }
}