Question

我按照了一个测验教程，一切正常，但是当我想添加重置按钮以便测验可以重新开始时它不起作用。这是代码，我试图重置数字，我尝试清空数组，但它没有工作。请帮助。

import UIKit

struct Question {
var Question : String!
var Answers : [String]!
var Answer : Int!
}

class ViewController: UIViewController {

@IBOutlet var buttons: [UIButton]!
@IBOutlet weak var qLabel: UILabel!
@IBOutlet weak var novceki: UILabel!

var Questions = [Question]()

var Qnumber = Int()

var AnswerNumber = Int()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.


    Questions = [Question(Question: "Jesi pojeo?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 0),
        Question(Question: "Najvisi vrh piramide?" , Answers: ["10", "39", "40", "55"], Answer: 2),
        Question(Question: "Jesi popusio?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 0),
        Question(Question: "Jesi bio vani?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 3)]

    pickQuestion()

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

 func pickQuestion (){

 if Questions.count > 0{
        //Qnumber = 0
        Qnumber = random() % Questions.count
        qLabel.text = Questions[Qnumber].Question

        AnswerNumber = Questions[Qnumber].Answer

        for i in 0..<buttons.count{
            buttons[i].setTitle(Questions[Qnumber].Answers[i], forState: UIControlState.Normal)
        }
        Questions.removeAtIndex(Qnumber)
}
    else {
        NSLog("Done!")
    }
}


@IBAction func Btn1(sender: UIButton) {

    if AnswerNumber == 0 {
        pickQuestion()
    }
    else{

        NSLog("CORRECT!")
    }
}

@IBAction func Btn2(sender: UIButton) {
    if AnswerNumber == 1 {
        pickQuestion()
    }
    else{
        NSLog("Wrong!")
    }
}

@IBAction func Btn3(sender: UIButton) {
    if AnswerNumber == 2 {
        pickQuestion()
    }
    else{
        NSLog("Wrong!")
    }
}

@IBAction func Btn4(sender: UIButton) {
    if AnswerNumber == 3 {
        pickQuestion()
    }
    else{
        NSLog("Wrong!")
    }
}
@IBAction func reset(sender: UIButton) {
    pickQuestion()  //- here is the problem, what to put here? it only continue with quiz it does not restart it, tried with reset numbers and array, but don't work
 }
 }

Answer 1

创建一个功能来重新生成您的问题：

func freshQuestions() -> [Questions] {
    return [Question(Question: "Jesi pojeo?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 0),
        Question(Question: "Najvisi vrh piramide?" , Answers: ["10", "39", "40", "55"], Answer: 2),
        Question(Question: "Jesi popusio?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 0),
        Question(Question: "Jesi bio vani?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 3)]
}

更改viewDidLoad：

override func viewDidLoad() {
    super.viewDidLoad()
    Questions = freshQuestions()
    pickQuestion()    
}

然后：

@IBAction func reset(sender: UIButton) {
    Questions = freshQuestions()
    QNumber = 0
    pickQuestion()  //- here is the problem, what to put here? it only continue with quiz it does not restart it, tried with reset numbers and array, but don't work
 }

如果你在自己的resetQuiz()函数中将这两个新行包装在reset-function中，那就更好了。

Answer 2

您的重置按钮需要重新填充您的问题数组，因为每次调用pickQuestion()时，您都会从数组中删除问题。

您可以通过将此数组添加到重置功能来重新声明阵列。

Questions = [Question(Question: "Jesi pojeo?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 0),
        Question(Question: "Najvisi vrh piramide?" , Answers: ["10", "39", "40", "55"], Answer: 2),
        Question(Question: "Jesi popusio?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 0),
        Question(Question: "Jesi bio vani?" , Answers: ["Jesam", "Nisam", "Budem", "Fuj"], Answer: 3)]

理想情况下，为了减少重复的代码，你应该将问题数组的总体重构为它自己的函数。

Swift Quiz - 重置按钮

2 个答案: