ios - 通过 segue 传递错误的数据

Question

我正在尝试为我的测验随机分配问题，并在答案回答不正确时显示 segue。我认为这可能与我的 NewNumber() 有关，但我无法弄清楚。

有时它适用于前 3 个问题，但即使通过按钮选择了正确答案，也会触发 segue。

所以，我喜欢的是:- 随机问题(没有重复，但我不得不摆脱 list.remove 因为它搞砸了正确答案 segue 甚至更多)- 如果按下了错误的答案，我希望它触发一个带有正确相应信息的另一个屏幕

我列出了完整的代码，因为我不知道它是否也与我的订单或功能有关。

class RoundThree: UIViewController {

    @IBOutlet weak var FuelLevel: UIImageView!
    @IBOutlet weak var QuestionLabel: UILabel!
    @IBOutlet weak var Car: UIImageView!
    @IBOutlet weak var SmallTown: UIImageView!

    //Outlet for Buttons

    @IBOutlet weak var OptionA: UIButton!
    @IBOutlet weak var OptionB: UIButton!
    @IBOutlet weak var OptionC: UIButton!



    let allQuestions2 = QuestionBank2()
    var questionNumber: Int = 0
    var oldQNumber: Int = 0
    var score: Int = 0
    var selectedAnswer: Int = 0
    var fuelleackage: CGFloat = 0
    var wronganswer: Int = 0
    let screenSize: CGRect = UIScreen.main.bounds
    var questionsasked = [Int]()



    override func viewDidLoad() {
        newNumber()
        startQuiz()
        super.viewDidLoad()
        }

    @IBAction func answerPressed(_ sender: UIButton){
        if sender.tag == selectedAnswer {
            Car.frame.origin.x  += 40
            score += 1
            fuelleackage += 0.0
            NewYorkCity()

        }  else if sender.tag != selectedAnswer {
            fuelleackage += 40.0
            wronganswer += 1
            EducateYourself()
            NewYorkCity()


        }
        updateUI()

    }

    func updateQuestion(){
            QuestionLabel.text = allQuestions2.list[oldQNumber].question
            OptionA.setTitle(allQuestions2.list[oldQNumber].optionA, for: UIControl.State.normal)
            OptionB.setTitle(allQuestions2.list[oldQNumber].optionB, for: UIControl.State.normal)
            OptionC.setTitle(allQuestions2.list[oldQNumber].optionC, for: UIControl.State.normal)
            selectedAnswer = allQuestions2.list[oldQNumber].CorrectAns
        }




    func updateUI(){
        FuelLevel.frame.size.width = screenSize.width * (1.0-0.15 * CGFloat(wronganswer))
        oldQNumber = questionNumber
        newNumber()
        updateQuestion()
        questionsasked.append(questionNumber)
        }
        //Carol.frame.origin.x  += 30



    func startQuiz (){
        score = 0
        updateQuestion()
        updateUI()
    }


    func NewYorkCity(){
        if (Car.frame.origin.x + (Car.frame.width / 2))  > (SmallTown.frame.origin.x + SmallTown.frame.width) {
            performSegue(withIdentifier: "FinishWindow", sender: self)
        }
        else if (screenSize.width * (1.0-0.15 * CGFloat(wronganswer)) <= 0)
        { performSegue(withIdentifier: "saaaad", sender: self)
        }
    }

        override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
            if (segue.identifier == "PopUp2") {
                let vc1 = segue.destination as! CorrectInfoPopUp2
                vc1.InformationRoundNumber = oldQNumber
            }
        }
    func EducateYourself(){
        performSegue(withIdentifier: "PopUp2", sender: self)
    }

    func newNumber() {
        for _ in 0..<allQuestions2.list.count {
            var rand = Int(arc4random_uniform(UInt32(allQuestions2.list.count)))
            while questionsasked.contains(rand) {
                rand = Int(arc4random_uniform(UInt32(allQuestions2.list.count)))
            }
            questionNumber = rand
        }
    }


}

Answer 1

在 newNumber 方法中，您分配了 questionNumber，但是在准备 segue 时，您分配了 oldQNumber 作为 vc1 的变量。因为你在调用 newNumber 后没有更改 oldQNumber，所以我想你想传递 questionNumber

vc1.InformationRoundNumber = questionNumber