Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Bruno Fernandes
Bruno Fernandes
2,413 Points
Posted by Bruno Fernandes
Bruno Fernandes
2,413 Points

Why isn't this working?

Why doesn't it work?

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
      return height + points
  }
}

1 Answer

Steve Hunter
Steve Hunter
57,684 Points

Hi Bruno,

You are returning two things from your incrementBy method. The method shouldn't return anything as it is just accessing the member variables.

The method needs to receive a parameter; a number to increment the two instance variables by. It then adds the parameter value to the two variables. Something like:

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

I hope that makes sense.

Steve.