Swift Recap Part 2 in Build a Simple iPhone App with Swift 3

Question

Line 19 is not running correctly with the single quote in the double quote. It's messing up the rest of the code, so I had to remove the single quote to make it work. Someone might want to fix it.
```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
```

Kyle Johnson · Answer

Here is one correct answer.
swift
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
    }
  }
}

Raphael Reiter · 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
        }
        }
    }

Zach Lorber-Termaat · Answer

I am also stuck on this one. The apostrophe isnt the problem, i have a feeling its the underscore in func move(_ direction: string). I have tried everything i can think of but am still stuck with the code below. Someone please help!
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
    }
  }
}

David Miller · Answer

You need to escape the apostrophe. Just put a backslash before the apostrophe in the print statement.

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Jin Choi

Jin Choi

Swift Recap Part 2 in Build a Simple iPhone App with Swift 3

4 Answers

Kyle Johnson

Kyle Johnson

David Miller

David Miller

Zach Lorber-Termaat

Zach Lorber-Termaat

Raphael Reiter

Raphael Reiter