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iOS Object-Oriented Swift Inheritance Inheritance and Initializers

becky hayes
becky hayes
2,226 Points

Not sure why the edits i've made to the init arent compiling...seem to be a lot of errors..

I've tried to call the init from the super class.. but it doesnt seem to be working!

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

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

1 Answer

Reed Carson
Reed Carson
8,306 Points
 init(subInitWidth: Double, subInitHeight: Double, cornerRadius: Double){

        self.cornerRadius = cornerRadius

        super.init(width: subInitWidth, height: subInitHeight)

the initializer for the subclass needs to gather values to pass into the super init because the subclass initializer is what will be called when you make an instance of it, not the super one.