Ios 当用户点击“时，如何在Swift中重置数组？”；“再玩一次”；

我在下面发布了一个简单的问答应用程序的代码，该应用程序询问用户某个州的首都是什么。我有一个名为

placeArray

的数组，每次询问该数组中的问题时，我都会调用

removatendex（）

，以避免重复问题。游戏结束后，

placeArray

部分或全部为空

因此，当用户选择再次播放时，如何将阵列恢复到其原始状态

import UIKit
import AudioToolbox

class ViewController: UIViewController {
    var userInput:String = ""
    var processedAnswerString = ""
    var finalAnswerString = ""
    var questionString:String = ""
    var correctAnswerString = ""
    var gameInPlay : Bool = false
    var correctAnswers : Int = 0
    var wrongAnswers : Int = 0
    var numberOfRounds : Int = 0
    var indexNumber : Int = 0

    var placeArray = ["Alabama", "Alaska", "Arizona", "Arkansas", "California",    "Colorado", "Connecticut", "Delaware", "Florida", "Georgia", "Hawaii", "Idaho", "Illinois", "Indiana", "Iowa", "Kansas", "Kentucky", "Louisiana", "Maine", "Maryland", "Massachusetts", "Michigan", "Minnesota", "Mississippi", "Missouri", "Montana", "Nebraska", "Nevada", "New Hampshire", "New Jersey", "New Mexico", "New York", "North Carolina", "North Dakota", "Ohio", "Oklahoma", "Oregon", "Pennsylvania", "Rhode Island", "South Carolina", "South Dakota", "Tennessee", "Texas", "Utah", "Vermont", "Virginia", "Washington", "West Virginia", "Wisconsin", "Wyoming"]

    var capitalArray = ["MONTGOMERY", "JUNEAU", "PHOENIX", "LITTLE ROCK", "SACRAMENTO", "DENVER" ,"HARTFORD", "DOVER", "TALLAHASSEE", "ATLANTA", "HONOLULU", "BOISE", "SPRINGFIELD", "INDIANAPOLIS", "DES MOINES", "TOPEKA", "FRANKFORT", "BATON ROUGE", "AUGUSTA", "ANNAPOLIS", "BOSTON", "LANSING", "SAINT PAUL", "JACKSON", "JEFFERSON CITY", "HELENA", "LINCOLN", "CARSON CITY", "CONCORD", "TRENTON", "SANTA FE", "ALBANY", "RALEIGH", "BISMARCK", "COLUMBUS", "OKLAHOMA CITY", "SALEM", "HARRISBURG", "PROVIDENCE", "COLUMBIA", "PIERRE", "NASHVILLE", "AUSTIN", "SALT LAKE CITY", "MONTPELIER", "RICHMOND", "OLYMPIA", "CHARLESTON", "MADISON", "CHEYENNE"]

    @IBOutlet weak var theTimer: UILabel!

    @IBOutlet weak var thePlace: UILabel!

    @IBOutlet weak var theGuess: UITextField!

    @IBOutlet weak var theCorrectAnswerScore: UILabel!

    @IBOutlet weak var theWrongAnswerScore: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.
        startGame()
        indexNumber = Int(arc4random_uniform(50))
        thePlace.text = "What is the capital of \(placeArray[indexNumber])?"

    }

    var startTime = NSTimeInterval()
    var timer = NSTimer()
    var gameTime:Double = 100


    func startGame() {

        let aSelector : Selector = "updateTime"
        timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: aSelector, userInfo: nil, repeats: true)
        startTime = NSDate.timeIntervalSinceReferenceDate()
    }

    func updateTime() {
    var currentTime = NSDate.timeIntervalSinceReferenceDate()
    var elapsedTime = currentTime - startTime
    var seconds = gameTime-elapsedTime
    if seconds > 0 {
        elapsedTime -= NSTimeInterval(seconds)
        theTimer.text = "\(Int(seconds))"
    } else {
        timer.invalidate()

        let alertController = UIAlertController(title: "Time's Up!", message: "You got \((correctAnswers/50)*100)% correct", preferredStyle: .Alert)

        let OKAction = UIAlertAction(title: "Play Again", style: .Default) { (action) in
            println("OK Pressed")
            self.wrongAnswers = 0
            self.correctAnswers = 0
            self.theGuess.text = ""
            self.gameTime = 100
            self.updateTime()
            self.startGame()
                  }
        alertController.addAction(OKAction)

        self.presentViewController(alertController, animated: true) {
            // ...
        }
    }
    }

    @IBAction func returnKeyPressed(sender: AnyObject) {

    userInput = theGuess.text
    questionString = capitalArray[indexNumber]

    processedAnswerString = userInput.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())

    //strip white space from answer
    //allow either with or without capitalization
    if processedAnswerString.capitalizedString == questionString.capitalizedString {
        correctAnswers++
        numberOfRounds++

        gameTime = gameTime + (gameTime/10)
        if placeArray.count > 0 {
            placeArray.removeAtIndex(indexNumber)
            capitalArray.removeAtIndex(indexNumber)

            theCorrectAnswerScore.text = "Yes:  \(String(correctAnswers))"

            theGuess.text = ""

            println("The current placeArray count is \(placeArray.count)")
            println("The current capitalArray count is \(capitalArray.count)")
            println("The current indexNumber is \(indexNumber)")
        }
    } else {
        wrongAnswers++
        numberOfRounds++

        if gameTime - (gameTime/10) >= 0 {
            gameTime = gameTime - (gameTime/10)
        }

        if  placeArray.count > 0 {
            placeArray.removeAtIndex(indexNumber)
            capitalArray.removeAtIndex(indexNumber)
            theWrongAnswerScore.text = "No:  \(String(wrongAnswers))"
            theGuess.text = ""

        }
        println("The current placeArray count is \(placeArray.count)")
        println("The current capitalArray count is \(capitalArray.count)")
        println("The current indexNumber is \(indexNumber)")
    }

    indexNumber = Int(arc4random_uniform(UInt32(placeArray.count)))

    if placeArray.count != 0 {
        thePlace.text = "What is the capital of \(placeArray[indexNumber])?"
    } else {
        let alertController = UIAlertController(title: "You win!", message: "Nice work!", preferredStyle: .Alert)

        let cancelAction = UIAlertAction(title: "Play Again", style: .Cancel) { (action) in
            self.wrongAnswers = 0
            self.correctAnswers = 0
            self.theGuess.text = ""
            self.gameTime = 100
            self.updateTime()
            self.startGame()
            // ...
        }
        alertController.addAction(cancelAction)

        let OKAction = UIAlertAction(title: "OK", style: .Default) { (action) in
            // ...
        }
        alertController.addAction(OKAction)

        self.presentViewController(alertController, animated: true) {
            // ...
        }
        }
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

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最简单的解决方案是使用一个方法返回数组的初始版本，然后当您完成或再次播放时，您可以使用该方法设置数组

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或者，您可以创建第二个数组来保存初始数组数据（当然是副本），然后从第二个数组中删除对象。再次点击play后，只需将初始阵列数据复制回第二个阵列，然后重新开始。第二个数组是显示问题并从中删除数据的数组。

我只需要创建一个helper方法来返回填充的数组

当游戏开始时（例如在self.startGame（）实现中），您将初始化正在使用的属性，这样每当游戏开始时，数组都将满

这看起来像：

self.placeArray! = self.fullPlacesArray();

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感谢所有花时间回答问题的人。我会尝试这些建议。我会投你们所有人的票，但我没有足够的声望点去做。