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iOS Object-Oriented Swift Inheritance What is Inheritance?

Posted by Brittany D
Brittany D
1,767 Points

Create an instance of the class RoundButton and name the instance rounded.

Not exactly sure what I am doing wrong.

Button.swift 
class Button {
  var width: Double
  var height: Double

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

    class RoundButton: Button{
      var cornerRadius = 5.0
    }
    var rounded = RoundButton(width : 10, height: 10)
  }
}

2 Answers

Helgi Helgason
Helgi Helgason
7,599 Points
Helgi Helgason
Helgi Helgason
7,599 Points

Looks about right, try changing the value of your parameters to 5.0

Brittany D
Brittany D
1,767 Points
Brittany D
Brittany D
1,767 Points

I got it! thank you.

Christopher Augg
Christopher Augg
21,223 Points

Hello Brittany,

Nice job on solving the issue. It looks like you found that you needed to move the RoundButton class out of the Button class, override init, and use super.init. Here is one solution that may help others:

class Button {
  var width: Double
  var height: Double

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

class RoundButton:Button {
   override init(width:Double, height:Double) {
    super.init(width:width, height:height)
  }
  var cornerRadius = 5.0
}

var rounded = RoundButton(width: 10.0, height: 10.0)

Please tell us how you solved it and post your solution if it is different.

Regards,

Chris