Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Build a Simple iPhone App with Swift 2.0 Getting Started with iOS Development Swift Recap Part 2

Jake White
Jake White
2,108 Points

Not sure how to do this one

This is confusing to me.

classes.swift
class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int){
        self.x = x
        self.y = y
    }
}


class Machine {
    var location: Point

    init() {
        self.location = Point(x: 0, y: 0)
    }

    func move(direction: String) {
        print("Do nothing! Im a machine!")
    }
}

// Enter your code below

1 Answer

Cindy Lea
PLUS
Cindy Lea
Courses Plus Student 6,497 Points

You need to add another class called Robot. This is where the movement of the robot is calculated:

class Robot: Machine {
    override func move(direction: String) {
        switch(direction) {
            case "Up":
                self.location.y++
            case "Down":
                self.location.y--
            case "Left":
                self.location.x--
            case "Right":
                self.location.x++
            default:
                break
        }
    }
}