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 Overriding Methods

Luke Telford
Luke Telford
2,931 Points
Posted by Luke Telford
Luke Telford
2,931 Points

need some help with this please

Im having an issue with this task and its making me want to rip my hair out! i keep getting this message -

Bummer! You didn't add the incrementBy method to the class RoundButton or click Preview for compiler errors.

with my code but from what i can tell i have added the method to the class! am i just being really simple or is there a mistake here?

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

Chase Marchione
Chase Marchione
155,055 Points
Chase Marchione
Chase Marchione
155,055 Points

You're an underscore (defines that the external parameter name should be skipped/omitted... in this case, we need to specify that for points) and a space away!

  override func incrementBy(_ points: Double = 7.0){
Luke Telford
Luke Telford
2,931 Points
Luke Telford
Luke Telford
2,931 Points

Thank you! i knew it would be something simple