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我在Swift中編寫了一個應用程序，其中所有元素都以編程方式添加。UIButton上的文本沒有更新SWIFT
//This code is inside of viewDidLoad function
makeButtonWithName(button: answer0B, title: "0", font:
"HelveticaNeue", fontSize: resetHeight, frame: CGRect(x:width/2 -
viewWidth/2, y: firstViewY, width: viewWidth, height: viewHeight),
selector: #selector(self.answer0(_:)))
makeButtonWithName(button: answer1B, title: "0", font: "HelveticaNeue",
fontSize: resetHeight, frame: CGRect(x:width/2 - viewWidth/2, y:
secondViewY, width: viewWidth, height: viewHeight), selector:
#selector(self.answer1(_:)))
makeButtonWithName(button: answer2B, title: "0", font:
"HelveticaNeue", fontSize: resetHeight, frame: CGRect(x:width/2 -
viewWidth/2, y: thirdViewY, width: viewWidth, height: viewHeight),
selector: #selector(self.answer2(_:)))
makeButtonWithName(button: answer3B, title: "0", font:
"HelveticaNeue", fontSize: resetHeight, frame: CGRect(x:width/2 -
viewWidth/2, y: fourthViewY, width: viewWidth, height: viewHeight),
selector: #selector(self.answer3(_:)))
firstNumber = Int(arc4random_uniform(9))
secondNumber = Int(arc4random_uniform(9))
incorrectAnswer1 = Int(arc4random_uniform(18))
incorrectAnswer2 = Int(arc4random_uniform(18))
incorrectAnswer3 = Int(arc4random_uniform(18))
timer.invalidate()
seconds = 31
runTimer()
randomNumbers()
//End viewDidLoad function
func answer0(_ sender: UIButton!){
let a:Int? = Int((answer0B.titleLabel?.text)!)
if a == answerNumber{
correctIncorrectLabel.text = "Correct"
correctIncorrectLabel.textColor = UIColor.green
correctNumber += 1
}
else{
correctIncorrectLabel.text = "Incorrect"
correctIncorrectLabel.textColor = UIColor.red
}
randomNumbers()
}
func answer1(_ sender: UIButton!){
let b:Int? = Int((answer1B.titleLabel?.text)!)
if b == answerNumber{
correctIncorrectLabel.text = "Correct"
correctIncorrectLabel.textColor = UIColor.green
correctNumber += 1
}
else{
correctIncorrectLabel.text = "Incorrect"
correctIncorrectLabel.textColor = UIColor.red
}
randomNumbers()
}
func answer2(_ sender: UIButton!){
let c:Int? = Int((answer2B.titleLabel?.text)!)
if c == answerNumber{
correctIncorrectLabel.text = "Correct"
correctIncorrectLabel.textColor = UIColor.green
correctNumber += 1
}
else{
correctIncorrectLabel.text = "Incorrect"
correctIncorrectLabel.textColor = UIColor.red
}
randomNumbers()
}
func answer3(_ sender: UIButton!){
let d:Int? = Int((answer3B.titleLabel?.text)!)
if d == answerNumber{
correctIncorrectLabel.text = "Correct"
correctIncorrectLabel.textColor = UIColor.green
correctNumber += 1
}
else{
correctIncorrectLabel.text = "Incorrect"
correctIncorrectLabel.textColor = UIColor.red
}
randomNumbers()
printProblem()
}
func randomNumbers(){
firstNumber = Int(arc4random_uniform(9))
secondNumber = Int(arc4random_uniform(9))
answerNumber = firstNumber + secondNumber
printProblem()
randomButton = Int(arc4random_uniform(4))
incorrectAnswer1 = Int(arc4random_uniform(18))
incorrectAnswer2 = Int(arc4random_uniform(18))
incorrectAnswer3 = Int(arc4random_uniform(18))
showTextOnButton()
totalCorrect.text = "Total Correct: \(correctNumber)"
}
func showTextOnButton(){
if randomButton == 0 {
answer0B.setTitle("\(answerNumber)", for: .normal)
answer1B.setTitle("\(incorrectAnswer1)", for: .normal)
answer2B.setTitle("\(incorrectAnswer2)", for: .normal)
answer3B.setTitle("\(incorrectAnswer3)", for: .normal)
}
if randomButton == 1 {
answer1B.setTitle("\(answerNumber)", for: .normal)
answer0B.setTitle("\(incorrectAnswer1)", for: .normal)
answer2B.setTitle("\(incorrectAnswer2)", for: .normal)
answer3B.setTitle("\(incorrectAnswer3)", for: .normal)
}
if randomButton == 2 {
answer1B.setTitle("\(answerNumber)", for: .normal)
answer2B.setTitle("\(incorrectAnswer1)", for: .normal)
answer0B.setTitle("\(incorrectAnswer2)", for: .normal)
answer3B.setTitle("\(incorrectAnswer3)", for: .normal)
}
if randomButton == 3 {
answer1B.setTitle("\(answerNumber)", for: .normal)
answer2B.setTitle("\(incorrectAnswer1)", for: .normal)
answer3B.setTitle("\(incorrectAnswer2)", for: .normal)
answer0B.setTitle("\(incorrectAnswer3)", for: .normal)
}
}
func printProblem(){
questionLabel.text = "\(firstNumber) + \(secondNumber)"
}
func makeButtonWithName(button: UIButton,title: String, font: String, fontSize: Int, frame: CGRect, selector: Selector) {
let button = UIButton(type: UIButtonType.custom)
button.setTitle(title, for: .normal)
button.frame = frame
button.setTitleColor(UIColor.white, for: .normal)
button.titleLabel?.font = UIFont(name: font, size: CGFloat(fontSize))
button.addTarget(self, action: selector, for: .touchUpInside)
self.view.addSubview(button)
}
這4個按鈕有文字。當您單擊其中每個按鈕時，按鈕上的文本不會更改。這些函數使用set title來更新按鈕上的文本，但是對於應用程序的每次運行，按鈕都起作用，但其上的文本保持爲0.
請編輯您的問題以包括相關代碼（作爲文本，而不是鏈接或圖片）。 – rmaddy
請只發布相關的代碼。將其縮小爲單個按鈕，並只顯示與您的問題相關的代碼。 – rmaddy
你必須更精確和整潔。 –