Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Danny Kilkenny
Danny Kilkenny
4,507 Points

Complier Problem With Swift Recap Part 2

I have put this code into a playground with out any errors but when I put it into the code challenge it says that it couldn't be compiled. I looked at the editor but nothing shows up. Can any one explain this?

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!")
    }
}

class Robot: Machine {
    init(x: Int, y: Int) {

    }

    override func move(direction: String) {
        switch direction {
        case "Up":
            self.location.y += 1
        case "Down":
            self.location.y -= 1
        case "Left":
            self.location.x -= 1
        case "Right":
            self.location.x += 1
        default:
            break
        }
    }
}

1 Answer

Anjali Pasupathy
Anjali Pasupathy
28,883 Points

Try getting rid of the init method in Robot. Machine does all the initialization of the properties you need, and Robot doesn't change anything about how those properties are initialized, so the init method is unneeded.

Danny Kilkenny
Danny Kilkenny
4,507 Points

Thank you! I forgot that the init wasn't needed in this situation