继续学习高低纸牌游戏，遇到下一张纸牌不存在的问题，无论按上还是下按钮，下一张纸牌都不会出现，代码中是否有我忘记或看不到的东西？希望在这场比赛中只有一生。我可以看到按下按上下按钮时游戏可以正常工作，因为我收到了得分和游戏结束的提醒消息
var cards = [Card]()
var lives = 1 {
didSet {
self.liveLabel.text = "Lives: \(lives)"
}
}
var score = 0 {
didSet {
self.scoreLabel.text = "Score: \(score)"
}
}
var cardIndex = 0
var cardValue = ""
@IBOutlet weak var liveLabel: UILabel!
@IBOutlet weak var scoreLabel: UILabel!
@IBOutlet weak var cardImageView: UIImageView!
@IBOutlet weak var lowButton: UIButton!
@IBOutlet weak var hiButton: UIButton!
let endPoint = "http://cards.davidneal.io/api/cards"
fileprivate func loadCardDeck() {
lowButton.isEnabled = false
hiButton.isEnabled = false
let cardApi = CardAPIClient()
cardApi.getCards(endPoint: endPoint) { (cardData) in
DispatchQueue.main.async {
self.cards = cardData ?? [Card]()
print(self.cards.count as Any)
self.cards = self.suffle()
self.lowButton.isEnabled = true
self.hiButton.isEnabled = true
self.cardValue = self.cards[0].value ?? ""
self.setDisplayCard()
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.lives = 1
self.score = 0
self.loadCardDeck()
}
@IBAction func lowButtonPress(_ sender: Any) {
cardIndex += 1
let nextCardValue = self.cards[cardIndex].value
setDisplayCard()
if nextCardValue != self.cardValue {
if !NextCardIsHigher(firstValue: self.cardValue, secondValue: nextCardValue!) {
score += 1
} else {
lives -= 1
}
}
self.cardValue = self.cards[cardIndex].value ?? ""
checkGameOverReset()
}
fileprivate func resetLabels() {
self.lives = 1
self.score = 0
self.cardIndex = 0
var suffle = self.suffle()
self.cards = suffle
suffle = [Card]()
self.cardValue = self.cards[0].value ?? ""
self.setDisplayCard()
}
fileprivate func checkGameOverReset() {
if lives <= 0 {
let alert = UIAlertController(title: "Game Over", message: "Your score is \(score)", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
self.resetLabels()
}))
self.present(alert, animated: true)
}
}
@IBAction func hiButtonPress(_ sender: Any) {
cardIndex += 1
let nextCardValue = self.cards[cardIndex].value ?? ""
setDisplayCard()
if nextCardValue != self.cardValue {
if NextCardIsHigher(firstValue: self.cardValue, secondValue: nextCardValue) {
score += 1
} else {
lives -= 1
}
}
self.cardValue = self.cards[cardIndex].value ?? ""
checkGameOverReset()
}
func suitValue( suit: String)-> String {
switch suit {
case "spades" :
return "S"
case "diamonds":
return "D"
case "clubs":
return "C"
case "hearts":
return "H"
default:
return ""
}
}
func setDisplayCard() {
let nextCardValue = self.cards[cardIndex].value ?? ""
let nextCardSuit = self.cards[cardIndex].suit ?? ""
let nextCardSuitShortdesc = self.suitValue(suit: nextCardSuit)
let imageName = nextCardValue + nextCardSuitShortdesc
if let imgPat = Bundle.main.path(forResource: imageName, ofType: "png") {
self.cardImageView.image = UIImage(contentsOfFile: imgPat)
}
}
func NextCardIsHigher(firstValue: String, secondValue: String)-> Bool {
var defaultReturn = false
var firstString = ""
var secondString = ""
switch firstValue {
case "A" :
firstString = "1"
case "J" :
firstString = "11"
case "K" :
firstString = "12"
case "Q" :
firstString = "13"
default :
firstString = firstValue
}
switch secondValue {
case "A" :
secondString = "1"
case "J" :
secondString = "11"
case "K" :
secondString = "12"
case "Q" :
secondString = "13"
default :
secondString = secondValue
}
( Int(secondString)! > Int(firstString)! ) ? (defaultReturn = true) : (defaultReturn = false)
return defaultReturn
}
func suffle()-> [Card] {
var shuffled = [Card]();
for _ in 0..<self.cards.count {
let rand = Int(arc4random_uniform(UInt32(self.cards.count)))
shuffled.append(self.cards[rand])
self.cards.remove(at: rand)
}
return shuffled
}
}