I am stuck on an Object-Oriented Swift challenge. I'm not sure if it's my mistake or a bug. Can anybody help?

Question

Below is the specific page that I'm stuck on. I am getting a recurring error message which doesn't seem to be true & I cannot proceed with the course until I can complete the challenge. 
https://teamtreehouse.com/library/objectoriented-swift/inheritance/overriding-methods-2
Here is my code:
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
   override func incrementBy(points:Double = 7.0) {
    width += points
    height += points
  }
}
And here is the error message:
Bummer! You didn't add the incrementBy method to the class RoundButton or click Preview for compiler errors.
swift_lint.swift:20:18: error: argument names for method 'incrementBy(points:)' do not match those of overridden method 'incrementBy'
   override func incrementBy(points:Double = 7.0) {
Many thanks to anybody who can help!

Alexander Smith · Answer

It should be modeled like this 
swift
class RoundButton: Button {
  var cornerRadius: Double = 5.0
  override func incrementBy(_ points: Double = 7.0){
    width += points
    height += points
  }
}

I would do the swift 2 course as putting the '_' is obsolete. You are correct otherwise

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George Hawkins

George Hawkins

I am stuck on an Object-Oriented Swift challenge. I'm not sure if it's my mistake or a bug. Can anybody help?

1 Answer

Alexander Smith

Alexander Smith