从Swift中的plist中选择随机目录

Question

我下面有这样的课程来从plist那里挑选问题，但现在我想以随机顺序接受它们

class QuizLoader {

public func loadSimpleQuiz(forQuiz guizName: String) throws -> [SimpleQuestion] {
    var questions = [SimpleQuestion]()
    if let path = Bundle.main.path(forResource: guizName, ofType: "plist") {
        if let dict = NSDictionary(contentsOfFile: path) {
            let tempArray: Array = dict["Questions"]! as! [Dictionary<String,AnyObject>]
            for dictionary in tempArray {
                let questionToAdd = SimpleQuestion(question: dictionary["Question"] as! String, correctAnswer: dictionary["CorrectAnswer"] as! String)


            }

            return questions

        } else {
            throw LoaderError.dictionaryField
        }

    } else {
        throw LoaderError.pathField
    }
}

我尝试使用此hint执行此操作，但我在var unsignedArrayCount = UInt32(quoteDictionary.count)

时出错

我已经花了几个小时试图搞清楚，但仍然没有运气。

    func loadQuestions() {

    do {
        questionArray = try quizeLoader.loadMultipleChoiceQuiz(forQuiz: "MultipleChoice")
        loadNextQuestion()
    } catch  {
        switch error {
        case LoaderError.dictionaryField:
            print("Could not load directory")
        case LoaderError.pathField:
            print("Cound not find valid file at path")
        default:
            print("Unknown error")
        }
    }


}


func loadNextQuestion() {
    currentQuestion = questionArray[questionIndex]
    setTitleForButtons()
}