옳은 답이 쓰여졌을 때 정확한 퀴즈 쇼에 대한 대답 라벨을 만들려면 어떻게해야합니까?

Question

그러면 올바른 대답 만 쓰면 다음 질문 버튼 만 허용하는 방법은 무엇입니까? 나는 스위프트를 사용하고있다! 아래는 제 코드입니다. 어떤 도움이라도 대단히 감사하겠습니다! 감사!

이 내 코드와 수입 UIKit

class InputViewController1: UIViewController, UITextFieldDelegate { 

@IBOutlet var questionLabel: UILabel! 

@IBOutlet var correctAnswerLabel: UILabel! 

@IBOutlet var inputTextField: UITextField! 

var enteredAnswer: String? 

var correctAnswer = "Correct Answer = Small" 

override func viewDidLoad() { 
     super.viewDidLoad() 

    // Do any additional setup after loading the view. 
      NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(InputViewController1.keyboardWillShow(_:)), name: UIKeyboardWillShowNotification, object: nil) 
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(InputViewController1.keyboardWillHide), name: UIKeyboardWillHideNotification, object: nil) 

    inputTextField.delegate = self 

    titlesForLabels() 
} 

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

func titlesForLabels() { 
    questionLabel.text = "What is the size of the lesion(s)?" 
    correctAnswerLabel.text = correctAnswer 
    correctAnswerLabel.hidden = true 

    inputTextField.text = nil 
    inputTextField.enabled = true 
} 

func keyboardWillShow(notification: NSNotification) { 
    let userInfo = notification.userInfo! 

    let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue() 

    UIView.animateWithDuration(0.1, animations: {() -> Void in 
     self.view.frame.origin.y = -keyboardFrame.size.height 
    }) 
} 

func keyboardWillHide() { 
    UIView.animateWithDuration(0.1, animations: {() -> Void in 
     self.view.frame.origin.y = 0 
    }) 
} 

func textFieldShouldReturn(textField: UITextField) -> Bool { 
    textField.resignFirstResponder() 

    enteredAnswer = textField.text 

    checkForCorrectAnswer() 

    return true 
} 

func checkForCorrectAnswer() { 
    if enteredAnswer!.lowercaseString == correctAnswer.lowercaseString { 
     print("Correct") 
     correctAnswerLabel.textColor = UIColor.greenColor() 
    } else { 
     print("Wrong Answer") 
     correctAnswerLabel.textColor = UIColor.redColor() 

    } 
    correctAnswerLabel.hidden = false 
} 

}에서

Answer 1

는 질문을하기 전에 매우 신중하게이 코드를 공부하십시오. UIControlEvents.EditingChanged (.EditingChanged)에 addTarget 방법을 사용하면 inputTextField의 실시간 현재 값으로 InputViewController의 속성을 변경할 수 있습니다. 이것은 textDidChange 기능에서 수행됩니다. 또한 nexButton.alpha은 0.0에 viewDidLoad으로 설정되고 그에 따라 textDidChange 및 checkForCorrectAnswer에서 변경됩니다.

class InputViewController1: UIViewController, UITextFieldDelegate { 

    @IBOutlet weak var questionLabel: UILabel! 

    @IBOutlet weak var correctAnswerLabel: UILabel! 

    @IBOutlet weak var inputTextField: UITextField! 

    @IBOutlet weak var nextButton: UIButton! 

    @IBAction func nextButtonPressed(sender: UIButton) { 


    } 

    var enteredAnswer: String? 

    var correctAnswer = "Small" 

    override func viewDidLoad() { 
    super.viewDidLoad() 
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(InputViewController1.keyboardWillShow(_:)), name: UIKeyboardWillShowNotification, object: nil) 
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(InputViewController1.keyboardWillHide), name: UIKeyboardWillHideNotification, object: nil) 

    inputTextField.addTarget(self, action: #selector(InputViewController1.textDidChange(_:)), forControlEvents: .EditingChanged) 

    inputTextField.delegate = self 

    nextButton.alpha = 0.0 

    titlesForLabels() 
    } 

    func titlesForLabels() { 
    questionLabel.text = "What is the size of the lesion(s)?" 
    correctAnswerLabel.text = correctAnswer 
    correctAnswerLabel.hidden = true 

    inputTextField.text = nil 
    inputTextField.enabled = true 
    } 

    func keyboardWillShow(notification: NSNotification) { 
    let userInfo = notification.userInfo! 

    let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue() 

    UIView.animateWithDuration(0.1, animations: { 
     self.view.frame.origin.y = -keyboardFrame.size.height 
    }) 
    } 

    func keyboardWillHide() { 
    UIView.animateWithDuration(0.1, animations: { 
     self.view.frame.origin.y = 0 
    }) 
    } 

    func textFieldShouldReturn(textField: UITextField) -> Bool { 
    textField.resignFirstResponder() 

    enteredAnswer = textField.text 

    checkForCorrectAnswer() 

    return true 
    } 

    func checkForCorrectAnswer() { 
    if enteredAnswer!.lowercaseString == correctAnswer.lowercaseString { 
     correctAnswerLabel.textColor = UIColor.greenColor() 
     UIView.animateWithDuration(0.5, animations: { 
     self.nextButton.alpha = 1.0 
     }, completion: nil) 
     correctAnswerLabel.text = "Correct!" 
    } else { 
     print("Wrong Answer") 
     correctAnswerLabel.textColor = UIColor.redColor() 
     correctAnswerLabel.text = "Incorrect!" 
    } 
    correctAnswerLabel.hidden = false 
    } 

    func textDidChange(sender: UITextField) { 
    enteredAnswer = inputTextField.text 
    correctAnswerLabel.textColor = UIColor.redColor() 
    correctAnswerLabel.text = "Incorrect!" 
    if enteredAnswer!.lowercaseString != correctAnswer.lowercaseString { 
     UIView.animateWithDuration(0.5, animations: { 
     self.nextButton.alpha = 0.0 
     }, completion: nil) 
    } 
    } 

}