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iOS Build a Simple iPhone App with Swift Creating a Data Model Finishing Up Our Model

Posted by Daniel Mendez
Daniel Mendez
1,792 Points

Assign the document FactBook.swift to a constant

I cant assign the document FactBook.swift to the let factBook statment it prints an error "Unresolved identifier FactBook"

Daniel Mendez
Daniel Mendez
1,792 Points

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var factLabel: UILabel!

let factBook = FactBook()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    factLabel.text = factBook.factsArray[1]
}

3 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

you dont have your FactBook.swift code inside the struct. all that code needs to be inside a struct named FactBook

//  FactBook.swift
//  Fact Game
//
//  Created by Daniel Mendez on 12/20/14.
//  Copyright (c) 2014 Daniel Mendez. All rights reserved.
//

import Foundation

// put code inside struct
struct FactBook {


let factsArray = [
    "Ants stretch when they wake up in the morning.",
    "Ostriches can run faster than horses.",
    "Olympic gold medals are actually made mostly of silver.",
    "You are born with 300 bones; by the time you are an adult you will have 206.",
    "It takes about 8 minutes for light from the Sun to reach Earth.",
    "Some bamboo plants can grow almost a meter in just one day.",
    "The state of Florida is bigger than England.",
    "Some penguins can leap 2-3 meters out of the water.",
    "On average, it takes 66 days to form a new habit.",
    "Mammoths still walked the earth when the Great Pyramid was being built."
]

func randomFact() {
    var unasignedArrayNumber = (UInt32(factsArray.count))
    var unasignedRandomNumber =  arc4random_uniform(unasignedArrayNumber)
    var randomNumber = Int(unasignedRandomNumber)

    return factsArray[randomNumber]
}
// make sure and close the struct with a closing curly brace
}

make the above changes and save the file. your code should work after that.

the reason it was not working before is the line

let factBook = FactBook()

initializes an instance of the Struct FactBook that should be defined in FactBook.swift, however you did not have the struct in there so it did not recognize it

Daniel Mendez
Daniel Mendez
1,792 Points
Daniel Mendez
Daniel Mendez
1,792 Points

// FactBook.swift // Fact Game // // Created by Daniel Mendez on 12/20/14. // Copyright (c) 2014 Daniel Mendez. All rights reserved. //

import Foundation

let factsArray = [ "Ants stretch when they wake up in the morning.", "Ostriches can run faster than horses.", "Olympic gold medals are actually made mostly of silver.", "You are born with 300 bones; by the time you are an adult you will have 206.", "It takes about 8 minutes for light from the Sun to reach Earth.", "Some bamboo plants can grow almost a meter in just one day.", "The state of Florida is bigger than England.", "Some penguins can leap 2-3 meters out of the water.", "On average, it takes 66 days to form a new habit.", "Mammoths still walked the earth when the Great Pyramid was being built." ]

func randomFact() { var unasignedArrayNumber = (UInt32(factsArray.count)) var unasignedRandomNumber = arc4random_uniform(unasignedArrayNumber) var randomNumber = Int(unasignedRandomNumber)

return factsArray[randomNumber]

}

I already have the document with all the code, in the ViewContrller.swift the code recognizes the facts array but not the document.

Daniel Mendez
Daniel Mendez
1,792 Points
Daniel Mendez
Daniel Mendez
1,792 Points

Thanks :)