Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Object-Oriented Swift Inheritance What is Inheritance?

Posted by Kevin Mai
Kevin Mai
8,049 Points

How to create an instance of a class?

How to name an instance of a class?

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
}

1 Answer

Donald Test
Donald Test
3,339 Points
Donald Test
Donald Test
3,339 Points

The challenge is a little confusing because it does not state that you can use any values you want for the named instance. You want to just insert your own values, to complete the challenge. Like this:

class Button {
  var width: Double
  var height: Double

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

class RoundButton: Button{
  var cornerRadius: Double = 5.0
}

var rounded = RoundButton(width: 4.5, height: 5.5)
Kevin Mai
Kevin Mai
8,049 Points

Thanks. Very appreciated:)