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

Posted by Fredrick Barrett
Fredrick Barrett
2,068 Points

My switch statement using enumerations doesn't work

I believe I got the concept of enumerations down, but I'm not sure why my code isn't working in this situation. Any information on what I'm doing wrong is greatly appreciated

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: return location.y += 1
        case Direction.down: return location.y -= 1
        case Direction.left: return location.x -= 1
        case Direction.right: return location.x +=1
        }
    }
}

1 Answer

Magnus Hållberg
Magnus Hållberg
17,232 Points
Magnus Hållberg
Magnus Hållberg
17,232 Points

Its just a tiny little thing i the last row of the switch, you need a space between "+=" and 1. Nothing else.

Fredrick Barrett
Fredrick Barrett
2,068 Points

Thanks