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

Posted by STEVEN PENA
STEVEN PENA
13,928 Points

When you tell the robot to move up (by specifying Direction.Up as the argument), the y coordinate should increase by 1.

need a little help with this

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 Direction.Up: location.y += 1
        case Direction.Down: location.y -= 1
        case Direction.Left: location.x -= 1
        case Direction.Right: location.x += 1



        }
}

2 Answers

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

Capitalization not needed on enum cases; they must match enum declaration

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

        }
    }
}
Jo Lingenfelter
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.a{fill-rule:evenodd;}techdegree seal-36
Jo Lingenfelter
Treehouse Project Reviewer
Jo Lingenfelter
.a{fill-rule:evenodd;}techdegree seal-36
Jo Lingenfelter
Treehouse Project Reviewer

Your enum cases are capitalized, but they are lowercase in the enum description. Fix that and you should be good.