學習記錄#8 甜蜜的 Apple Pie

目的:
研讀 Apple 官方電子書 App Development with Swift 第二章，完成它的 Guided Project，Apple Pie，學習 array，struct 自訂型別，didSet，for in，string interpolation。

題目參考來源:
Apple 官方電子書 App Development with Swift 裡 ch2 的 Guided Project，Apple Pie。

‎App Development with Swift

Apple 官方簡單版

規則如下:

1.畫面下方以 _ 顯示要猜的單字，比方單字是 peter，一開始將顯示
_ _ _ _ _，五個底線。

2.如果猜的字母在單字裡，原本顯示的 _ 將變成猜的字母，比方單字是 peter，當我們猜了 p 跟 e，畫面下方將顯示 p e _ e _。

var formattedWord: String  {
var guessedWord = ""
      for letter in word{
          if guessedLetters.contains(letter)  {
                  guessedWord += "\(letter)"
              }
           else {
                  guessedWord += "_"
              }
      }
         return guessedWord
 }

3.如果猜的字母沒有在單字裡，將會掉一顆蘋果，如果七顆蘋果掉光光的話，你就輸了。

 let incorrectMovesAllowed = 7
mutating func playerGuessed (letter: Character) {
      guessedLetters.append(letter)
           if !word.contains(letter){
                  incorrectMovesRemaining -= 1
              }
  }

4.猜過的字母不能再按。

sender.isEnabled = false

5.有多個單字可猜，最下方將顯示單字猜對的次數，比方猜對 3 次，猜錯 1 次。

6.猜完一個單字後，更新最下方的猜對次數，繼續猜下一個單字，此時蘋果會回到七個，全部字母也會重新變成可以按。

var totalWins = 0  {
      didSet {
        newRound()
     }
}
var totalLosses = 0  {
      didSet {
        newRound()
     }
}

func updateUI() {
   var letters = [String]()
      for letter in currentGame.formattedWord {
              letters.append(String(letter))
          }
    let wordWithSpacing = letters.joined (separator:" ")
          correctWordLabel.text = wordWithSpacing
          scoreLabel.text = "猜對: \(totalWins),猜錯: \(totalLosses)"
          treeImageView.image = UIImage(named: "Tree \   (currentGame.incorrectMovesRemaining)")
}
//按鈕重新可點選
func enableLetterButtons(_enable: Bool)  {
      for button in letterButtons  {
           button.isEnabled = _enable
      }
}
func newRound() {
   if  listOfWords.isEmpty == false {
   let newWord = listOfWords.removeFirst()
       currentGame = Game(word: newWord, incorrectMovesRemaining:      incorrectMovesAllowed, guessedLetters: [])
        enableLetterButtons(_enable: true)
        updateUI()
       }
       else {
         enableLetterButtons(_enable: false)
   }
}
func updateUI() {
  var letters = [String]()
    for letter in currentGame.formattedWord {
         letters.append(String(letter))
      }
  let wordWithSpacing = letters.joined (separator:" ")
         correctWordLabel.text = wordWithSpacing
         scoreLabel.text = "猜對: \(totalWins),猜錯: \(totalLosses)"
        treeImageView.image = UIImage(named: "Tree \  (currentGame.incorrectMovesRemaining)")
}

func updateGameState() {
if currentGame.incorrectMovesRemaining == 0 {
       totalLosses += 1
  }
  else if currentGame.word == currentGame.formattedWord {
       totalWins += 1
  }
  else {
    updateUI ()
  }
}

初步成果

擴充版

1. 加上計分機制，猜對完整的單字有分數。

guessRight += 10

2.加上音效，掉蘋果時有音效。

func speek(){
let speechUtterance = AVSpeechUtterance(string: "oh oh 猜錯了")
speechUtterance.voice = AVSpeechSynthesisVoice(language: "zh-TW")
speechUtterance.rate = 0.5
speechUtterance.postUtteranceDelay = 50
let synthesizer = AVSpeechSynthesizer()
synthesizer.speak(speechUtterance)
}

3.計時制，目標在愈短的時間內猜對5個單字。

var gameTimer:Timer?
var timerCount = 0

@objc func timerSet() {
timerCount += 1
let mins =  timerCount/60
let seconds = timerCount % 60
self.timeLabel.text = " 時間 \(String(format:"%.2d", mins)):\(String(format:"%.2d", seconds))"
totalTime += 1
}
//全數猜中立即停止
if totalWins == 5{
//時間停止
gameTimer?.invalidate()
let alert = UIAlertController(title: "花費時間", message: "\(totalTime)秒"  , preferredStyle: .alert)
let action = UIAlertAction(title: "結束", style: .default) { (_) in
}
alert.addAction(action)
present(alert, animated: true, completion: nil)
}

4.使用者可選擇不同的水果。

switch select {
case 0:
treeImageView.image = UIImage(named: "Tree \(currentGame.incorrectMovesRemainingPlayer1)")
case 1:
treeImageView.image = UIImage(named: "orange \(currentGame.incorrectMovesRemainingPlayer1)")
case 2:
treeImageView.image = UIImage(named: "Strawberry \(currentGame.incorrectMovesRemainingPlayer1)")
default:
break
}

成果

有聲版成果

完整程式Github

Chingwenluo/applePie

參考資料

#8 甜蜜的 Apple Pie (恐怖的 Hangman)