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iOS Object-Oriented Swift Classes and Objects Classes and Their Methods

Posted by swilllsea
swilllsea
4,957 Points

What am I doing wrong on this challenge?

I'm assuming I have to return something different?

Button.swift 
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 width + points
  }
}
justindennison
justindennison
15,922 Points

You are on the right track. However, we want to add points to the current value of both width and height. Additionally, per the specification of incrementBy there is no return value. For instance, if you wanted to increment the width by points this would be accomplished by 

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

This will address the increase of width by points. However, you should add the height portion which will be very similar. Hope this helps.

swilllsea
swilllsea
4,957 Points

Thank you Justin - I ended up using Holger's solution, but I trust that your solution would work well too!

1 Answer

Holger Liesegang
Holger Liesegang
50,595 Points
Holger Liesegang
Holger Liesegang
50,595 Points

Welcome to Treehouse, S Willsea !

"...within the method add points to the width and height properties..." asks you to add points to the width and height properties like this:

width = points + width
height = points + height

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 + width
    height = points + height
  }
}
swilllsea
swilllsea
4,957 Points

Thank you Holger, it seems simple in retrospect.