ios - 在 View Controller 之间传递类？

Question

我正在构建一个测验应用程序，并且我试图通过让一个 View Controller 充当问题 View Controller 来减少 View Controller 的数量。这是用户进行测验的 View Controller 。

我有多个问题库，其中包含特定于某个类别的问题。这些题库是 .swift 文件，我认为它们被分类为类，它们看起来像这样:

import Foundation

class QuestionBank {

var list = [Questions]()

init() {

    let item = Questions(text: "what does blah blah blah mean?", correctAnswer: "blah blah", textA: "blah blah blah", textB: "blah", textC: "blah bla", textD: "blee blah" )

    list.append(item)

    list.append(Questions(text: "this is a question?", correctAnswer: "correct answer", textA: "examplea", textB: "exampleb", textC: "examplec", textD: "exampled"))

    list.append(Questions(text: ".......

    list.append(Questions(text: ".......

    list.append(Questions(text: ".......

    }


}

下面只是 QuestionViewController 的第一行，但它显示 var allQuestions 保存着 GeographyQuestionBank。 GeographyQuestionBank 看起来像上面的 QuestionBank 示例代码(但有实际问题哈哈)

import UIKit

import Foundation

class QuestionsViewController: UIViewController {

var allQuestions = GeographyQuestionBank()

...

我了解如何使用prepare(for segue:...) 函数在 View Controller 之间传递内容。但我不确定如何将类传递给 allQuestions 变量。那可能吗？

我希望这是有道理的，如果没有，请发送消息，我会尽力解释得更好。但我只是希望能够根据前一个 View Controller 上选择的类别将问题库类传递到 QuestionsViewController 。

Answer 1

如果将问题数组传递给第二个 View Controller ，事情就会变得非常简单，如下所示。

第一个 View Controller

import UIKit

 class FirstViewController: UIViewController {

        var selectedCategoryQuestions :[Questions] = []
        override func viewDidLoad() {
            super.viewDidLoad()
        }
        @IBAction func onClickBtnHistoryQuestions(_ sender: Any)
    {
        //Fill your array with History Question
       self.performSegue(withIdentifier: "yourSecondVC", sender: nil)
    }
    @IBAction func onClickBtnGeoQuestions(_ sender: Any) {
        //Fill your array with Geo Question
self.performSegue(withIdentifier: "yourSecondVC", sender: nil)
    }

 if (segue.identifier == "yourSecondVC")
        {
            let destVC:yourSecondVC =  segue.destination as! yourSecondVC
            destVC.questionList = selectedCategoryQuestions

        }
    }

第二个 View Controller

 class SecondViewController: UIViewController {

        var questionList:[Questions] = []
        override func viewDidLoad() {
            super.viewDidLoad()


            println(questionList)  //You get selected list here
        }

}