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iOS

Posted by arnavthecoder
arnavthecoder
3,453 Points

How to finish the code challenge: classes and their methods.

Here is the code

class Button {
  var width: Double
  var height: Double

  init(width:Double, height:Double){
    self.width = width
    self.height = height
  }


  func incrementBy (points: Double) -> Double {

  return   points + height ;  points + width 


  }



}

The error is:

Bummer! You forgot to add 'points' to the property 'width' within the 'incrementBy' method.

2 Answers

kjvswift93
kjvswift93
13,515 Points

It should look like this...

class Button {
  var width: Double
  var height: Double

  init(width:Double, height:Double){
    self.width = width
    self.height = height
  }

  func incrementBy(points: Double)  {
    width = width + points
    height = height + points
    }
}
kjvswift93
kjvswift93
13,515 Points

You see instead of returning a double and writing a return statement, modify the stored property itself within the method. (The stored properties being 'width' and 'height'). Then just assign width equal to width + points and height to height + points. By doing this, there is no need to return a double, so eliminate the '-> Double'.

arnavthecoder
arnavthecoder
3,453 Points

Thank you Kyle Vandeven. I understand what to do now...

arnavthecoder
arnavthecoder
3,453 Points
arnavthecoder
arnavthecoder
3,453 Points

I, sadly, have another problem:

class Button {
  var width: Double
  var height: Double

  init(width:Double, height:Double){
    self.width = width
    self.height = height
  }

  func incrementBy(points: Double){
    width += points
    height += points
  }
}

class RoundButton: Button {
  var cornerRadius: Double = 5.0
}