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 Getting Started with iOS Development Swift Recap Part 2

Arius Eich
Arius Eich
2,769 Points

Error with not error

I'm not sure why there is an error in the challenge compiler while there is not an error in my play ground. Thank you.

robots.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! I'm a machine!")
  }
}

// Enter your code below

class Robot: Machine {
    var direction: String

   init(direction: String) {
        self.direction = direction
       // self.location = Point(x: 0, y: 0)
    }
    override func move(_ direction: String) {

        switch direction {
        case "Up": location.y += 1

        case "Down": location.y -= 1

        case "Left": location.x -= 1

        case "Right": location.x += 1

        default:
            break
      }
    }
}

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! You have a little extra code which isn't creating an error but is simply not needed. The init will be run from the Machine class. and the direction will be set upon creating an instance of Robot and sent in at the time of creation. So if I simply remove:

    var direction: String

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

...your code passes with flying colors!

Good job on not getting hung up on theswitch statement! :thumbsup:

Happy coding! :sparkles: