Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.


Aaryen Labana
Aaryen Labana
2,586 Points

Adding and subtracting dice in my own game. Please help!

Hi all,

I've decided to make a game involving adding and subtracting dice which are from image views. I cannot think of how to do it so could anyone help me on this? Is there a way to remove the image view entirely and then bring it back, or just change the image view to match the background. thanks

Aaryen Labana
Aaryen Labana
2,586 Points

Here is my code: When I press the button, five dice are rolled at random, but I want the option to ba able to increase/decrease the number of dice from 1-5 at most.

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var die1: UIImageView!
@IBOutlet weak var die2: UIImageView!
 @IBOutlet weak var die3: UIImageView!
@IBOutlet weak var die4: UIImageView!
@IBOutlet weak var die5:UIImageView!
let diceArray = [ #imageLiteral(resourceName: "DiceOne"),#imageLiteral(resourceName: "DiceTwo"),#imageLiteral(resourceName: "DiceThree"),#imageLiteral(resourceName: "DiceFour"),#imageLiteral(resourceName: "DiceFive"),#imageLiteral(resourceName: "DiceSix")]

@IBAction func diceProvider(_ sender: UIButton) {
    die1.image = diceArray.randomElement()
    die2.image = diceArray.randomElement()
    die3.image = diceArray.randomElement()
    die4.image = diceArray.randomElement()
    die5.image = diceArray.randomElement()


@IBAction func subtractDice(_ sender: Any) {


@IBAction func addDice(_ sender: Any) {


2 Answers

Jesus Cancino
Jesus Cancino
2,494 Points

I just broke this down in playgrounds here. From what I understood. You want to randomize your array of dice. So you have your variables in a array here.

var die1 = 1
var die2 = 1
var die3 = 1

var diceArray = [die1,die2,die3]

and then you have your function that does a for loop that changes the values of each variable in the array.

func diceRandomizer2()  {
    for item in diceArray.indices {
    diceArray[item] = Int.random(in: 1..<7)

Then you want to be able to subtract dice here.

 func subtractDice() {
    if diceArray.isEmpty {
        print("There are no dice! Please add a dice")
    } else {
        print("Last dice has been removed")

and add dice.

func addDice() {

    print("A die has been added")

call the functions to test it out and see if that is what you want to be working. I was thinking of making the dice into a struct and have the add function create a new instance of the struct and append that to the array so your array would read [die1,die2,die3,die4] and etc.

let me know if this helps you out or no.

Thanks for asking! I am still also learning how to better write more efficient code.

Aaryen Labana
Aaryen Labana
2,586 Points

Hi Jesus Cancino,

thanks for the reply. However when I put it in I got an error fro. the addDice function, it say: Cannot convert value of type 'Int' to expected argument type 'UIImage'.