Xcode Quiz look-a-like app with question and answer - arrays

Question

I am trying to create a quiz look-a-like app, where the person who holds the phone ask the question, and the other people answer. So there will be two Strings. One with question, and one with the answer. I have created the questions something like this:
var questions = ["Question1", "Question2", "Question3", "Question4", "Question5"]
var answers = ["Answer1", "Answer2", "Answer3", "Answer4", "Answer5"]
When the tap a button, a new question with correct answer pops up. I know how I can display a random string from questions, but how do I connect it to also display the correct answer?

Answer 1

Another option is to use a Dictionary, with the Question as the Key and the Answer as the Value:
let questions: [String : String] = [
"Question1" : "Answer1",
"Question2" : "Answer2",
"Question3" : "Answer3",
"Question4" : "Answer4",
"Question5" : "Answer5"
]
You can then get a random Question & Answer like this:
let randomQuestion = questions.randomElement()
Then access the Question and Answer Text:
let questionText = randomQuestion?.key ?? ""
let answerText = randomQuestion?.value ?? ""
In relation to your next question:
How can I make sure the same question does not show multiple times, and when there are no more questions
You can construct an Array from the Dictionary Keys like this. The keys will be unordered anyway, but you should shuffle them if you want to repeat.
You can then iterate through each question in the randomised Array:
Set your properties in viewDidLoad, not when the button is tapped.
let randomQuestions = questions.keys.shuffled()
var currentQuestionIndex = 0
#IBAction func newQuestionButton(_ sender: Any) {
guard currentQuestionIndex != questions.count else {
return
// or reset your questionIndex and reshuffle.
}
// This will give you the Question (and Key)
let question = randomQuestions[currentQuestionIndex]
// Use the Key to extract out the answer (value) from the Dictionary
let answer = questions[question] ?? ""
// Update your labels
questionLabel.text = question
answerLabel.text = answer
// Increment your question index
currentQuestionIndex += 1
}

Answer 2

You can simply zip together questions and answers and then call randomElement on the result. This will give you a Tuple containing a random question and its respective answer - assuming the indices of questions and answers are in sync.
var questions = ["Question1", "Question2", "Question3", "Question4", "Question5"]
var answers = ["Answer1", "Answer2", "Answer3", "Answer4", "Answer5"]
let questionsAndAnswers = Array(zip(questions, answers))
let randomQA = questionsAndAnswers.randomElement()

Answer 3

You could create a QuizItem type like. Since you always need them together it is good practice to tie them together in one element instead of having two arrays.
struct QuizItem {
var question: String
var answer: String
}
Then you create and array (or list) [QuizItem] and add all items you want. At last you simply take random element of the array.
Here is some pseudo code:
var quizList = [QuizItem]()
quizList.append(...) // add questions & answers
let randomIndex = randomIndex between 0 and quizList.length-1
let item = quizList[randomIndex]
questionLable.text = item.question
answereLabel.text = item.answere