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iOS Object-Oriented Swift Classes and Objects Classes and Their Methods

Emmet Lowry
Emmet Lowry
10,196 Points
Posted by Emmet Lowry
Emmet Lowry
10,196 Points

not sure how to add to a property in the challange at the end of turning classes to structs

it asks me to add points to the width and height variables inside this method

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){

  }
}

4 Answers

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Hiya,

The function has a parameter passed into it called points, this contains the number that the width and height need to be increased by.

You could try:

self.width += points
self.height+= points

Or maybe a more sensible:

self.width = self.width + points
self.height = self.height + points

Let me know how you get on with those. My Xcode is rebuilding at the moment as I just did a fresh build of my Mac so I can't test those suggestions. If they don't work, I'll beback up and running in no tiem; I'll have a more detailed look for you then.

Steve.

Steve Hunter
Steve Hunter
57,712 Points

Apologies - to be clear - both those suggestions need to go inside the func incrementBy method.

Emmet Lowry
Emmet Lowry
10,196 Points
Emmet Lowry
Emmet Lowry
10,196 Points

Thanks for the answer Steve. It is more clear to me now

Emmet Lowry
Emmet Lowry
10,196 Points
Emmet Lowry
Emmet Lowry
10,196 Points

could i ask you if i should learn objective c or is there any point since i learned swift

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

No problem with the suggested solution!

As for Obj-C & Swift. That depends - if you're totally new to programming, just go down the Swift route. The concepts you will learn are pretty much identical, particularly from the iOS perspective. If you want to be able to edit legacy apps in Obj-C, have a look through that too but I do belive they are both pretty easy to swith between.

The iOS bit is the challenge, not the Swift/Obj-C bit. Same with Android. Java is what it is but programming Android devices in Java is a whole separate thing.

I hope that helps - else, just shout!

Steve.