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!

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 Inheritance Inheritance and Initializers

I can't solve this problem I don't see where the error is.

I see errors in the log but I can't find the mistake.

class Button {
  var width: Double
  var height: Double

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

  func scaleBy(points: Double){
    width += points
    height += points

class RoundButton: Button {
  var cornerRadius: Double = 5.0

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

1 Answer

You need to call the super first:

    super.init(width: width, height: height)
    self.cornerRadius = cornerRadius

Hope that helps!


Thanks it was also because I had "width: Double" instead of "width: width"

John Simoneau
John Simoneau
9,326 Points

While the answer is "correct" to pass the question... I'm confused because in the video, he says that you always want to call the super.init() AFTER the self.cornerRadius...