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Swift: checking JSON values ​​stored in NSMutableArray values

I am having trouble checking if the user in the JSON file has already been noticed by the user.

I have NSArray ( allEntries ) with Stored JSON in values. I create it like this:

let path = NSBundle.mainBundle().pathForResource("content", ofType: "json")
let jsonData : NSData = NSData(contentsOfFile: path!)!
allEntries = (try! NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.MutableContainers)) as! NSArray

If I print one of the values allEntries [0] , I get:

{
answers =     (
    Chimney,
    "Front door",
    Window,
    "Dog door"
);
difficulty = 1;
id = 2;
question = "How does Santa get into a house on Christmas eve?";
}

Now, later in my code, I need to call only one of the questions randomly, so I create an index and pass it to this function:

func LoadQuestion(index : Int)
{
    let entry : NSDictionary = allEntries.objectAtIndex(index) as! NSDictionary
    let questionID : Int = entry.objectForKey("id") as! Int
    let question : NSString = entry.objectForKey("question") as! NSString
    let arr : NSMutableArray = entry.objectForKey("answers") as! NSMutableArray

    ....
}

When the question is uploaded. I am adding this ID value to another array named already Asked

First I get this error:

Failed to pass value like "__NSCFString" (0x865ee0) to "NSNumber" (0x133781c).

in this line:

let questionID : Int = entry.objectForKey("id") as! Int

Int NSString:

let questionID : NSString = entry.objectForKey("id") as! NSString

:

let questionID = Int(questionIDRaw as! Int)

:

:

. Udemy . - , .

, , , , id ( json) hasaned. ?

:)

EDIT:

:

import UIKit
import AVFoundation // audio


class ViewController: UIViewController {

@IBOutlet weak var buttonA: UIButton!
@IBOutlet weak var buttonB: UIButton!
@IBOutlet weak var buttonC: UIButton!
@IBOutlet weak var buttonD: UIButton!


@IBOutlet weak var labelQuestion: UILabel!

@IBOutlet weak var labelScore: UILabel!

@IBOutlet weak var labelFeedback: UILabel!

@IBOutlet weak var buttonNext: UIButton!

@IBOutlet weak var BackgroundImageView: UIImageView!

var score :Int! = 0
var allEntries : NSArray!


var currentCorrectAnswerIndex : Int = 0

var audioPlayer = AVAudioPlayer()

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

    LoadAllQuestionsAndAnswers()

    let randomNumber = Int(arc4random_uniform(UInt32(allEntries.count)))
    LoadQuestion(randomNumber)
    LoadScore()

    AdjustInterface()
}

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


func LoadScore()
{
   let defaults = NSUserDefaults.standardUserDefaults()
    score = defaults.integerForKey("score")
    labelScore.text = "score: \(score)"
}


func SaveScore()
{
    let defaults = NSUserDefaults.standardUserDefaults()
    defaults.setInteger(score, forKey: "score")
}


func LoadAllQuestionsAndAnswers()
{
    let path = NSBundle.mainBundle().pathForResource("content", ofType: "json")
    let jsonData : NSData = NSData(contentsOfFile: path!)!
    allEntries = (try! NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.MutableContainers)) as! NSArray
    //println(allEntries)

}


func LoadQuestion(index : Int)
{
    let entry : NSDictionary = allEntries.objectAtIndex(index) as! NSDictionary
    let question : NSString = entry.objectForKey("question") as! NSString
    let arr : NSMutableArray = entry.objectForKey("answers") as! NSMutableArray

    //println(question)
    //println(arr)

    labelQuestion.text = question as String

    let indices : [Int] = [0,1,2,3]
    let newSequence = shuffle(indices)
    var i : Int = 0
    for(i = 0; i < newSequence.count; i++)
    {
        let index = newSequence[i]
        if(index == 0)
        {
            // we need to store the correct answer index
            currentCorrectAnswerIndex =  i

        }

        let answer = arr.objectAtIndex(index) as! NSString
        switch(i)
        {
        case 0:
            buttonA.setTitle(answer as String, forState: UIControlState.Normal)
            break;

        case 1:
            buttonB.setTitle(answer as String, forState: UIControlState.Normal)
            break;

        case 2:
            buttonC.setTitle(answer as String, forState: UIControlState.Normal)
            break;

        case 3:
            buttonD.setTitle(answer as String, forState: UIControlState.Normal)
            break;

        default:
            break;
        }



    }
    buttonNext.hidden = true
    // we will need to reset the buttons to reenable them
    ResetAnswerButtons()

}

func shuffle<C: MutableCollectionType where C.Index == Int>(var list: C) -> C {
    let total = list.count
    for i in 0..<(total - 1) {
        let j = Int(arc4random_uniform(UInt32(total - i))) + i
        swap(&list[i], &list[j])
    }
    return list
}

func ResetAnswerButtons()
{
    buttonA.alpha = 1.0
    buttonB.alpha = 1.0
    buttonC.alpha = 1.0
    buttonD.alpha = 1.0
    buttonA.enabled = true
    buttonB.enabled = true
    buttonC.enabled = true
    buttonD.enabled = true
}


@IBAction func PressedButtonA(sender: UIButton) {
    print("button A pressed")
    buttonB.alpha = 0.3
    buttonC.alpha = 0.3
    buttonD.alpha = 0.3

    buttonA.enabled = false
    buttonB.enabled = false
    buttonC.enabled = false
    buttonD.enabled = false
     CheckAnswer(0)
}

@IBAction func PressedButtonB(sender: UIButton) {
    print("button B pressed")
    buttonA.alpha = 0.3
    buttonC.alpha = 0.3
    buttonD.alpha = 0.3

    buttonA.enabled = false
    buttonB.enabled = false
    buttonC.enabled = false
    buttonD.enabled = false
    CheckAnswer(1)
}

@IBAction func PressedButtonC(sender: UIButton) {
    print("button C pressed")
    buttonA.alpha = 0.3
    buttonB.alpha = 0.3
    buttonD.alpha = 0.3

    buttonA.enabled = false
    buttonB.enabled = false
    buttonC.enabled = false
    buttonD.enabled = false
    CheckAnswer(2)
}

@IBAction func PressedButtonD(sender: UIButton) {
    print("button D pressed")
    buttonA.alpha = 0.3
    buttonB.alpha = 0.3
    buttonC.alpha = 0.3

    buttonA.enabled = false
    buttonB.enabled = false
    buttonC.enabled = false
    buttonD.enabled = false
    CheckAnswer(3)
}

@IBAction func PressedButtonNext(sender: UIButton) {
    print("button Next pressed")
    let randomNumber = Int(arc4random_uniform(UInt32(allEntries.count)))
    LoadQuestion(randomNumber)
    // we need to play a sound effect for the next question coming
    PlaySoundButton()

}

func CheckAnswer( answerNumber : Int)
{
    if(answerNumber == currentCorrectAnswerIndex)
    {
        // we have the correct answer
        labelFeedback.text = "Correct! +1"
        labelFeedback.textColor = UIColor.greenColor()
        score = score + 1
        labelScore.text = "score: \(score)"
        SaveScore()
        // later we want to play a "correct" sound effect
        PlaySoundCorrect()

    }
    else
    {
        // we have the wrong answer
        labelFeedback.text = "Wrong answer"
        labelFeedback.textColor = UIColor.redColor()
        // we want to play a "incorrect" sound effect
        PlaySoundWrong()
    }

    buttonNext.enabled = true
    buttonNext.hidden = false
}

func PlaySoundCorrect()
{
   let alertSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("correct", ofType: "mp3")!)

    let error:NSError?
    do {
        audioPlayer = try AVAudioPlayer(contentsOfURL: alertSound)
    } catch let error1 as NSError {
        error = error1
        print(error)
    }
    audioPlayer.prepareToPlay()
    audioPlayer.play()


}

func PlaySoundWrong()
{
    let alertSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("wrong", ofType: "wav")!)

    var error:NSError?
    do {
        audioPlayer = try AVAudioPlayer(contentsOfURL: alertSound)
    } catch let error1 as NSError {
        error = error1
        print(error)
    }
    audioPlayer.prepareToPlay()
    audioPlayer.play()
}


func PlaySoundButton()
{
    let alertSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("button", ofType: "wav")!)

    let error:NSError?
    do {
        audioPlayer = try AVAudioPlayer(contentsOfURL: alertSound)
    } catch let error1 as NSError {
        error = error1
        print(error)
    }
    audioPlayer.prepareToPlay()
    audioPlayer.play()
}


func AdjustInterface()
{
    let screenSize: CGRect = UIScreen.mainScreen().bounds
    let screenWidth = screenSize.width
    let screenHeight = screenSize.height

    buttonA.center = CGPointMake(screenWidth / 2, buttonA.center.y)
    buttonB.center = CGPointMake(screenWidth / 2, buttonB.center.y)
    buttonC.center = CGPointMake(screenWidth / 2, buttonC.center.y)
    buttonD.center = CGPointMake(screenWidth / 2, buttonD.center.y)
    buttonNext.center = CGPointMake(screenWidth / 2, buttonNext.center.y)
    labelQuestion.center = CGPointMake(screenWidth / 2, labelQuestion.center.y)

    BackgroundImageView.frame = CGRectMake(0, 0, screenWidth, screenHeight)


}

}

, , . , , , i:

  • JSON
  • Asked
  • , . ,
  • , ,
+4
2
  • JSON

Int? , questionID .

let questionID = entry["id"] as! String

( , - , .)

        let questionID = Int(entry["id"] as! String)!

(, "content.json" ...)

  • alreadyAsked

:

    var alreadyAsked: Set<String> = []

questionID :

        alreadyAsked.insert(questionID)

(, , .)

  • , . ,

, LoadQuestion(_:).

, , :

    func loadQuestion(index : Int) -> Bool

( : . . , "" Q & .)

, questionID, :

        if alreadyAsked.contains(questionID) {
            return false //already asked, so not again
        }

return true LoadQuestion(_:).

, LoadQuestion(_:) true.

        var randomNumber: Int
        repeat {
            randomNumber = Int(arc4random_uniform(UInt32(allEntries.count)))
        } while !loadQuestion(randomNumber)

( , ( " , "?) . " , " )

  • , ,

:

        if allEntries.count > alreadyAsked.count {
            var randomNumber: Int
            repeat {
                randomNumber = Int(arc4random_uniform(UInt32(allEntries.count)))
            } while !loadQuestion(randomNumber)
            loadScore()

            adjustInterface()
        } else {
            //display in console none left to view
            //...
        }

, , . , .

0

, Int :

let questionID : Int = entry.objectForKey("id") as! Int

Int

let questionID : Int = Int(entry.objectForKey("id"))

let questionID: NSString = entry.objectForKey( "id" ) ! NSString

:

questionID = Int (questionIDRaw as! Int)

be String, Int .

-1

Source: https://habr.com/ru/post/1650846/

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