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iOS

Posted by Pablo Lahoz
Pablo Lahoz
6,337 Points

Help on challenge! Cant seem to add points to the width and height properties.

Heres the challenge:

https://teamtreehouse.com/library/objectoriented-swift/classes-and-objects/classes-and-their-methods-2

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Pablo,

So we need a func that takes a Double called points and adds that to both the width and height of the object we're in.

Start by defining a method with the right name which takes one parameter which is a Double, the same as the two variables we're trying to alter. That looks like: func incrementBy(points: Double)

Inside that we need to add points to both the width and height member variables. Remember to use self. to make it very clear what you're doing. And to increment by a number you can use the += operator. Put all that together and you get:

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

Hope that helps.

Steve.