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

Arius Eich
Arius Eich
2,769 Points
Posted by 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
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STAFF
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Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.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: