General Quiz Logic

Assuming you have a "database" of 50+ questions - either in a file, or using Core Data, or getting them from a remote server, etc...

Supposing:

 - total number of questions is 50
 - number of questions to show is 15

Let's say we have a Question Data Object:

struct Question {
  var title: String = ""
  var answers: [String] = []
  var description: String = ""
  var userAnswered: Int = 0
}

and we have an array of Questions:

var questions: [Question] = []

On launch:

 - shuffle an array of 0..<50 Ints
   - we now have, for example, [23, 25, 4, 18, 44, 42, 41, ...]
 - loop through that array
   - load question shuffledInts[i]
      - create a Question Data object
      - fill the object with the question data, shuffling the answers string array
      - append that Question to questions array

We now have an Array of random Question objects, with their answers shuffled.

Proceed with the Quiz, using that array for each successive question.

When user selects an answer, update the Question object with the user's answer.

When the Quiz is finished, use a TableView to display all of those Questions, along with showing the user's answer and the Description.

If you want to allow the user to "Save Progress," you'll also need to Save the questions array to local storage (documents folder, for example). When the user completes a Quiz, don't save the data to a file and delete the data file if it exists.

Then, change "On launch" to:

- if saved file exists
   - load saved file and continue with Quiz
- else
    - shuffle an array of 0..<50 Ints
    - etc...