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

Posted by perpetual makayi
perpetual makayi
8,441 Points

building a simple iphone app swift 3

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 { override func move(direction: String) { switch direction { case "Up": self.location = (Point(x: 0, y: 1)) case "Down": self.location = (Point(x: 0, y: -1)) case "Left": self.location = (Point(x: -1, y: 0)) case "Right": self.location = (Point(x: 1, y: 0)) default: break } } } hi can anyone assist me where & what im doing wrong im stuck for days

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 {
    override func move(direction: String) {
        switch direction {
        case "Up":
            self.location = (Point(x: 0, y: 1))
        case "Down":
            self.location = (Point(x: 0, y: -1))
        case "Left":
            self.location = (Point(x: -1, y: 0))
        case "Right":
            self.location = (Point(x: 1, y: 0))
        default: break
        }
    }
}

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points

You were close on this one; here is the answer

class Robot: Machine {

    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
        }
    }
}