swift - 如何在一系列问题的标签中显示下一个问题

Question

Screenshot of current code in simulator, once the next button is clicked nothing changes and the question presented in the label remains the same

我正在构建一个调查应用程序，并希望通过标签显示问题列表。但是，我当前的代码功能提出了相同的问题，点击按钮后我需要转到下一个问题。一旦点击按钮，标签就会呈现数组中的下一个问题，并将先前提出的问题移动到数组的末尾。这是我当前的 Swift 代码，用于点击按钮时调用的函数，到目前为止，点击按钮时它会提出相同的问题:

         func nextQuestion() {
    var questions = [choice1, choice2, choice3]
    var y = 0

    questionLbl.text = questions[y].question
    questions.remove(at: y)
    y += 1



    var button = UIButton()
    var tags = [0,1,2,3]

    for quest in questions {

    }

    for idx in tags {
        button = choiceButtons[idx]
        if idx < options.count {
            print("True! Index = \(idx) and options count = \(options.count)")
            button.setTitle(options[idx], for: .normal)

        }
        else {
            print("False! Index = \(idx) and options count = \(options.count)")

        }
    }

    print(questions)


}

这是我的对象模型，其中包含用于问题数组的对象:

      import Foundation

   var choice1 = User.Choice(question: "How old are you?", opt1: "12", opt2: "11", opt3: "10", opt4: "23")
   var choice2 = User.Choice(question: "What color are you?", opt1: "Black", opt2: "White", opt3: "Purple", opt4: "Brown")
   var choice3 = User.Choice(question: "What day is it?", opt1: "Monday", opt2: "Tuesday", opt3: "Friday", opt4: "Sunday")



   var users = [User]()

   struct User {
var fields: Field
var choices = [Choice]()

struct Field {
    var firstname: String
    var lastname: String
    var email: String

    init(first: String, last: String, email: String) {
        self.firstname = first
        self.lastname = last
        self.email = email
    }
}

struct Choice {
    var question: String
    var opt1: String
    var opt2: String
    var opt3: String
    var opt4: String

    init(question:String, opt1: String, opt2: String, opt3: String, opt4: String) {
        self.question = question
        self.opt1 = opt1
        self.opt2 = opt2
        self.opt3 = opt3
        self.opt4 = opt4
    }
}

}

Answer 1

您在 nextQuestion 方法中将 y 设置为 0，这每次都会重置计数:

var y = 0

questionLbl.text = questions[y].question
questions.remove(at: y)
y += 1

所以你总是得到问题数组中的第一个问题。另外，我不知道为什么每次都要从 questions 数组中删除第一项，因为每次调用 nextQuestion 时都会重新创建数组。