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iOS Intermediate Swift 2 Properties Computed Properties

Posted by Todd Stacy
Todd Stacy
5,816 Points

computed property help

really not sure how to do this at all. i understand what is being done in the video, but cant seem to put it to use here.

enum.swift 
let UIFontTextStyleHeadline = "UIFontTextStyleHeadline"
let UIFontTextStyleBody = "UIFontTextStyleBody"
let UIFontTextStyleFootnote = "UIFontTextStyleFootnote"

enum Text {
  case Headline
  case Body
  case Footnote

}

var style: String {

    get {

        let h = Text.Headline
        let b = Text.Body
        let f = Text.Footnote

        return String

    }

    set (value) {

        Text.Headline = value.Headline
        Text.Body = value.Body
        Text.Footnote = value.Footnote
    }

}

1 Answer

Steven Deutsch
Steven Deutsch
21,046 Points
Steven Deutsch
Steven Deutsch
21,046 Points

Hey Todd Stacy,

You're overcomplicating things. What we need to do here is create a computed property called style, inside of the enum declaration. This property will be a readonly computed property. For the getter method, we will switch on the instance this property is accessed on, also known as self. Based on the matching enum case, we will return its respective style.

let UIFontTextStyleHeadline = "UIFontTextStyleHeadline"
let UIFontTextStyleBody = "UIFontTextStyleBody"
let UIFontTextStyleFootnote = "UIFontTextStyleFootnote"

enum Text {
  case Headline
  case Body
  case Footnote

  var style: String {
     switch self {
        case Headline: return UIFontTextStyleHeadline
        case Body: return UIFontTextStyleBody
        case Footnote: return UIFontTextStyleFootnote
     }
  }
}

Good Luck

Todd Stacy
Todd Stacy
5,816 Points

i over think way too much. thank you for all your help!