CODEWITHSUNDEEP
iosswiftfunction
Bravo
Bravo

Reputation: 17

why am I getting (self: ) when I make function?

struct StoryBrain {
    var storyNumber = 0


    let Allstory = [
        Story(s: "There is a fork on the road", c1: "Take a left", c2: "Take a right"),
        Story(s: "There are two door", c1: "Enter the left door", c2: "Enter the Right door"),
        Story(s: "You can have either a dog or a cat", c1: "I will have a dog", c2: "I will have a cat")
    ]

    func getStory() ->String {
        return Allstory[storyNumber].mainStory
    }
    func getchoice1() -> String {
        return Allstory[storyNumber].choice1
    }
    func getchoice2() -> String {
        return Allstory[storyNumber].choice2
    }

This is Model

in view controller, I want to make updateUI function

func updateUI() {
    storyLabel.text = StoryBrain.getStory(self: StoryBrain)

I do not understand why I am getting (self: StoryBrain) instead of just ().

Upvotes: 0

Views: 60

Answers (3)

Jawad Ali
Jawad Ali

Reputation: 14397

These are not static or class methods ... you need to create object of that class to call its functions sir ... or make them static/class functions if you dont want to create object of that class

Either do

func updateUI() {
  let story = StoryBrain()
  storyLabel.text = story.getStory()
 }

Or you can make them static to use but thats not a good approach

struct StoryBrain {
   static var storyNumber = 0


   static let Allstory = [
        Story(s: "There is a fork on the road", c1: "Take a left", c2: "Take a right"),
        Story(s: "There are two door", c1: "Enter the left door", c2: "Enter the Right door"),
        Story(s: "You can have either a dog or a cat", c1: "I will have a dog", c2: "I will have a cat")
    ]

   static func getStory() ->String {
        return Allstory[storyNumber].mainStory
    }
   static func getchoice1() -> String {
        return Allstory[storyNumber].choice1
    }
  static  func getchoice2() -> String {
        return Allstory[storyNumber].choice2
    }

Now you can do 

func updateUI() {
    storyLabel.text = StoryBrain.getStory()
  }

Upvotes: 0

David Pasztor
David Pasztor

Reputation: 54706

You declaring getStory as an instance method. So you need to call it on an instance of StoryBrain, that is what the compiler is trying to tell you with self there.

let storyBrain = StoryBrain() // create an instance
storyLabel.text = storyBrain.getStory() // call the instance method on that instance

Upvotes: 0

juhan_h
juhan_h

Reputation: 4011

Because getStory() is not marked as static.

Upvotes: 1

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