Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Austin Wyatt
Austin Wyatt
3,146 Points

I'm not sure how to add "points" to the "height" and "width" properties inside the method

The coding challenge says that I need to "provide a means to increase the size of our Button. So we are going to add a method named incrementBy which will accept a parameter named points. (Within the method add points to the width and height properties)." I'm not sure on the specifics of this challenge and don't know how else to make my method work better. It says that I forgot to add "points" to the property "width" within the "incrementBy" method.

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)  {

  }
}

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points

Hello Austin :

You are close, all you need to do is โ€œAddโ€ the points. Obviously you do this when calling the method, but you have to set it up first.

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 // add โ€œpoints"
  height += points // add โ€œpoints"

  }
}

easy right ?

Enjoy the coding