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

Cody Adkins
Cody Adkins
7,260 Points
Posted by Cody Adkins
Cody Adkins
7,260 Points

Can someone help explain my error?

Please and Thank you.

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) {
        switch Direction {
        case .Up: location.y += 1
        case .Down: location.y -= 1
        case .Left: location.x -= 1
        case .Right: location.x += 1 
    }
}

1 Answer

jcorum
jcorum
71,830 Points

Two problems: (1) you need to switch on the object direction, not the type Direction. (2) You are missing the closing curly brace for switch:

    func move(direction: Direction) {
        switch direction {  //must be direction, not Direction
        case .Up: location.y += 1
        case .Down: location.y -= 1
        case .Left: location.x -= 1
        case .Right: location.x += 1 
        }          //was missing
    }