为啥我的一个 segues 不起作用？

Posted 2023-03-08

【中文标题】为啥我的一个 segues 不起作用？

【英文标题】：How come one of my segues isn't working?为什么我的一个 segues 不起作用？

【发布时间】：2017-07-29 07:27:00

【问题描述】：

我正在开发一个测验应用程序，当您正确回答问题时，它会转到一个视图控制器，如果您按错误答案，它会转到另一个视图控制器。但是，当我运行模拟器时，如果我点击了错误的答案，除了倒数计时器重置之外，什么都不会发生。但是，如果我单击正确的答案，那么 segues 就可以了。这是为什么呢？

这是我的代码：

import UIKit

class ViewController: UIViewController 

    var questionList = [String]()
    var counter = 15
    var timer = Timer()
    var rightAnswerBox:UInt32 = 0
    var index = 0

    //Question Label
    @IBOutlet weak var questionLabel: UILabel!

    @IBOutlet weak var questionTimer: UILabel!


    func updateCounter() 
        counter -= 1
        questionTimer.text = String(counter)

        if counter == 0 


            timer.invalidate()
            wrongSeg()
        
    

    func randomQuestion() 

        //random question
        if questionList.isEmpty 
            questionList = Array(QADictionary.keys)
        

        let rand = Int(arc4random_uniform(UInt32(questionList.count)))
        questionLabel.text = questionList[rand]


        //matching answer values to go with question keys
        var choices = QADictionary[questionList[rand]]!

        questionList.remove(at: rand)

        //create button
        var button:UIButton = UIButton()

        //variables
        var x = 1
        rightAnswerBox = arc4random_uniform(4)+1


        for index in 1...4
        
            button = view.viewWithTag(index) as! UIButton

            if (index == Int(rightAnswerBox))
            
                button.setTitle(choices[0], for: .normal)

            

            else 
                button.setTitle(choices[x], for: .normal)
                x += 1

            
        

        randomImage()

    

    //dictionary filled with question keys and answer values
    let QADictionary = [:]


    //wrong view segue
    func wrongSeg() 

        performSegue(withIdentifier: "incorrectSeg", sender: self)

    

    //proceed screen
    func rightSeg() 

        performSegue(withIdentifier: "correctSeg", sender: self)
    

    //Answer Button
    @IBAction func buttonAction(_ sender: AnyObject) 

        if (sender.tag == Int(rightAnswerBox)) 

            rightSeg()
            timer.invalidate()
            print ("Correct!")
        

        if counter != 0 

            counter = 15

         else if (sender.tag != Int(rightAnswerBox)) 

            wrongSeg()
            print ("Wrong!")
            timer.invalidate()
            questionList = []

        
    

    override func viewDidAppear(_ animated: Bool) 

        randomQuestion()

        questionTimer.text = String(counter)
        timer = Timer.scheduledTimer(timeInterval: 1, target:self, selector: #selector(ViewController.updateCounter), userInfo: nil, repeats: true)

    

【问题讨论】：

提供您的情节提要的图像以显示转场

@DharmeshKheni 我如何在这里分享项目？

【参考方案1】：

您在 buttonAction 中输入了错误的条件，我现在已更正它检查。只需替换 else if 条件

@IBAction func buttonAction(_ sender: AnyObject) 

        if (sender.tag == Int(rightAnswerBox)) 

            rightSeg()
            timer.invalidate()
            print ("Correct!")
        /*Here is change*/
      else if (sender.tag != Int(rightAnswerBox)) 
       

            wrongSeg()
            print ("Wrong!")
            timer.invalidate()
            questionList = []

        
        if counter != 0 

            counter = 15