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

Ryan Maneo
Ryan Maneo
4,342 Points

Extremely confused...

Second post regarding this one problem, first one: https://teamtreehouse.com/community/this-cant-be-right-is-it

This time I've tried again, and it still won't compile. I've changed several things over and over again and tweaked it over and over again. I tried Point instead of Direction for the instance, but its till didn't work. I hate being so confused over this.

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) {
        // Enter your code below
        switch Direction() {
        case Direction.Down: location.y -= 1
        case Direction.Up: location.y += 1
        case Direction.Left: location.x -= 1
        case Direction.Right: location.x += 1
        }
    }

}

1 Answer

Jason Anders
MOD
Jason Anders
Treehouse Moderator 145,704 Points

Hey Ryan,

You're really, really close. The problem is what you are switching on. You need to switch on the variable, so lower-case and no parenthesis.

func move(direction: Direction) {
        // Enter your code below
        switch direction {
        case Direction.Down: location.y -= 1
        case Direction.Up: location.y += 1
        case Direction.Left: location.x -= 1
        case Direction.Right: location.x += 1
        }
    }

Keep Coding! :dizzy: