Swift构造多项选择

Question

我需要使用Swift构建一个多选Q＆amp; A iOS应用。目前我使用的是“case”结构，如下所示。我面临两个问题：

1. 一旦正确回答，我不知道如何删除问题（或案例）
2. 当我构建成百上千个问题时，这个结构变得很麻烦。

有人可以提供更好的方法来实现这个吗？

func RandomQuestions () {
    var RandomNumber = arc4random() % 4

    switch (RandomNumber) {

    case 1:
        QuestionLabel.text = "What is the capital of Austria? "
        Button1.setTitle ("Istanbul", for: UIControlState.normal)
        Button2.setTitle ("Vienna", for: UIControlState.normal)
        Button3.setTitle ("Melbourne", for: UIControlState.normal)
        Button4.setTitle ("Perth", for: UIControlState.normal)
        CorrectAnswer = "2"

        break
    case 2:
        QuestionLabel.text = "What is 6 x 7? "
        Button1.setTitle ("12", for: UIControlState.normal)
        Button2.setTitle ("24", for: UIControlState.normal)
        Button3.setTitle ("42", for: UIControlState.normal)
        Button4.setTitle ("48", for: UIControlState.normal)
        CorrectAnswer = "3"

        break
    case 3:
        QuestionLabel.text = "What is the name of the yellow Power Ranger? "
        Button1.setTitle ("Willy", for: UIControlState.normal)
        Button2.setTitle ("Mario", for: UIControlState.normal)
        Button3.setTitle ("Ivan", for: UIControlState.normal)
        Button4.setTitle ("Alexander", for: UIControlState.normal)
        CorrectAnswer = "3"

        break
    case 4:
        QuestionLabel.text = "How many dwarves in Cinderella"
        Button1.setTitle ("12", for: UIControlState.normal)
        Button2.setTitle ("7", for: UIControlState.normal)
        Button3.setTitle ("3", for: UIControlState.normal)
        Button4.setTitle ("9", for    : UIControlState.normal)
        CorrectAnswer = "2"

        break

    default:
        break

Answer 1

我要做的是设计一个简单的模型对象（一个结构），其属性是文本，四个按钮标题和正确的答案。称之为问题。现在，您未回答的问题列表将成为一个问题数组。随机数是该数组的索引。此外，数组可以是可变的，因此您可以从中删除正确回答的问题。