This is a solution from Stackoverflow:
I created a new SwiftUI View file under the same name, and pasted the original code, and deleted the file.
Creating all new folders group, from the project folder, and copying all files over, next delete all olds folders, and click (Clean Build Folder) from Xcode / Product.
Relaunched the project. It Worked !!!
Faycel_TUN_2020
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Thanks, Claude31 for your help, but the problem persistError in line 28 Thread 1: Fatal error: Can't get random value with an empty rangeimport UIKit
class ViewController: UIViewController {
@IBOutlet weak var questionTextView: UITextView!
@IBOutlet weak var judgement: UILabel!
@IBOutlet weak var ans1: UIButton!
@IBOutlet weak var ans2: UIButton!
@IBOutlet weak var ans3: UIButton!
@IBOutlet weak var ans4: UIButton!
var question = ""
var CorAns = 0
var quizData: [Any] = []
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
loadJsonFile()
updateQA()
}
func updateQA() {
let index = Int.random(in: 0 ..< quizData.count)
let quizObject = quizData[index] as! Dictionary<String,Any>
question = quizObject["question"] as! String
questionTextView.text = question
let correctAns: String = quizObject["correct_answer"] as! String
let wrongAns: [String] = quizObject["incorrect_answers"] as! [String]
let correctIndex: Int = Int.random(in: 0...3)
switch correctIndex {
case 0:
CorAns = 0
ans1.setTitle(correctAns, for: .normal)
ans2.setTitle(wrongAns[0], for: .normal)
ans3.setTitle(wrongAns[1], for: .normal)
ans4.setTitle(wrongAns[2], for: .normal)
case 1:
CorAns = 1
ans2.setTitle(correctAns, for: .normal)
ans1.setTitle(wrongAns[0], for: .normal)
ans3.setTitle(wrongAns[1], for: .normal)
ans4.setTitle(wrongAns[2], for: .normal)
case 2:
CorAns = 2
ans3.setTitle(correctAns, for: .normal)
ans2.setTitle(wrongAns[0], for: .normal)
ans1.setTitle(wrongAns[1], for: .normal)
ans4.setTitle(wrongAns[2], for: .normal)
case 3:
CorAns = 3
ans4.setTitle(correctAns, for: .normal)
ans2.setTitle(wrongAns[0], for: .normal)
ans3.setTitle(wrongAns[1], for: .normal)
ans1.setTitle(wrongAns[2], for: .normal)
default:
print("Error")
}
judgement.text = "Select Any One"
judgement.textColor = UIColor.black
}
private func loadJsonFile() {
do {
if let file = Bundle.main.url(forResource: "quiz", withExtension: "json") {
let data = try Data(contentsOf: file)
let json = try JSONSerialization.jsonObject(with: data, options: [])
if let object = json as? [String: Any] {
// json is a dictionary
print("As Dictionary \(object)")
} else if let object = json as? [Any] {
// json is an array
print("As Array \(object)")
quizData = object
} else {
print("JSON is invalid")
}
} else {
print("no file")
}
} catch {
print(error.localizedDescription)
}
}
func correctAns() {
UIView.animate(withDuration: 1, animations: {
self.judgement.alpha = 0
}) { (complete) in
self.judgement.text = "Correct Answer"
self.judgement.textColor = UIColor.green
UIView.animate(withDuration: 1, animations: {
self.judgement.alpha = 1
}, completion: { (complete) in
DispatchQueue.main.asyncAfter(deadline: .now() + 2, execute: {
self.updateQA()
})
})
}
}
func wrongAns() {
UIView.animate(withDuration: 1, animations: {
self.judgement.alpha = 0
}) { (complete) in
self.judgement.text = "Wrong Answer"
self.judgement.textColor = UIColor.red
UIView.animate(withDuration: 1, animations: {
self.judgement.alpha = 1
}, completion: { (complete) in
DispatchQueue.main.asyncAfter(deadline: .now() + 2, execute: {
self.updateQA()
})
})
}
}
@IBAction func ans1Pressed(_ sender: Any) {
if (CorAns == 0) {
correctAns()
} else {
wrongAns()
}
}
@IBAction func ans2Pressed(_ sender: Any) {
if (CorAns == 1) {
correctAns()
} else {
wrongAns()
}
}
@IBAction func ans3Pressed(_ sender: Any) {
if (CorAns == 2) {
correctAns()
} else {
wrongAns()
}
}
@IBAction func ans4Pressed(_ sender: Any) {
if (CorAns == 3) {
correctAns()
} else {
wrongAns()
}
}
}
There is only one way to solve this issue.Quit Xcode.Delete project's temp files located at ~/Library/Developer/Xcode/DerivedDataDelete ProjectName.xcworkspaceDelete Podfile.lock file and Pods folderRun pod install.Open the newly created ProjectName.xcworkspace file and build.