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iOS Object-Oriented Swift Inheritance Overriding Methods

Posted by curtis allen
curtis allen
28,800 Points

Can't figure out what im doing wrong my code

hey guys, Can you take a look at my code below and let me know what I am doing wrong.

Our RoundButton class should have its own implementation of the incrementBy method. Override the incrementBy method in the RoundButton class and default the points parameter to 7.0.

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

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

  override func incrementBy(points:Double){
    width += points
    height += points
  }


}

class RoundButton: Button {
  var cornerRadius: Double = 5.0 

  override func incrementBy(_ points:Double = 7.0)-> Double {
    return super.incrementBy(points)
  }
}

1 Answer

Chris Shaw
Chris Shaw
26,676 Points
Chris Shaw
Chris Shaw
26,676 Points

Hi Curtis,

The issue lies with your method signature in RoundButton which doesn't match the method signature in Button, this is because you've added a return type to your override which doesn't exist on incrementBy within the Button class.

Simply remove that and the challenge will pass.

class RoundButton: Button {
  var cornerRadius: Double = 5.0

  override func incrementBy(_ points:Double = 7.0) {
    super.incrementBy(points)
  }
}
curtis allen
curtis allen
28,800 Points

Hey Chris, Thanks for your help.