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iOS Object-Oriented Swift Inheritance Overriding Methods

Umesh Shukla
Umesh Shukla
1,832 Points

Cannot override a method in subclass

In one of the challenge questions, I'm trying to override a method. It works fine in playground but not in TreeHouse console. My code snippet is attached.

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){
    width += points
    height += points
  }
}

class RoundButton: Button {
  var cornerRadius: Double = 5.0
  override func incrementBy(points: Double = 7.0){
    width += points
    height += points
  }
}

1 Answer

Reed Carson
Reed Carson
8,306 Points

it wants you to use a wildcard (underscore) in front of the argument name 'points'.

so override func incrementBy(_ points: Double = 7.0) will do it

I have no idea why the workspace compiler throws an error but XCode does not.