#2 撲克牌(桌遊) App：抽鬼牌

(一)操作畫面GIF

win game

操作影片

(二) Github連結

SmoothieNoIce/CardsGame

(三)文字說明

這次的作業我選的是抽鬼牌這個卡牌遊戲，用到了許多在課堂上教到的SwitftUI的語法和新的元件，也額外加入了動畫和背景音樂，雖然抽鬼牌的邏輯看似不難，但一些邏輯像是選擇下個抽牌玩家，判斷輸贏，棄牌演算法等還是需要一些時間來撰寫的，此作業也花了我不少時間來完成，算是有挑戰性的題目。

(四)重點程式碼講解

抽排Delay函式

func delay(_ delay:Double, closure:@escaping ()->()) {
   DispatchQueue.main.asyncAfter(
      deadline: DispatchTime.now() + Double(Int64(delay *      Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: closure)
}
//NSEC_PER_SEC ios的一秒

背景音樂

if let filePath = Bundle.main.path(forResource: "background_music", ofType: "mp3"){
let fileUrl = URL(fileURLWithPath: filePath)
let player = AVQueuePlayer()
let item = AVPlayerItem(url: fileUrl)
self.looper = AVPlayerLooper(player: player, templateItem: item)
player.play()
}

類型結構

struct Card : Identifiable,Hashable{
   let id = UUID()
   let suit:String //花色
   let rank:String //數字
   var c = 1.0 //卡牌透明度
   var f = 0 //卡牌位移值
}
struct Player{
   var id :Int
   var isNoCard = false //玩家如果為false遊戲結束
   var cardList = [Card]()
}
//兩兩個相同數字的牌
struct DropCard{
   var card1:Card 
   var card2:Card
}
let suits = ["clubs","diamonds","hearts","spades"]
let ranks = ["ace", "2", "3", "4", "5", "6", "7", "8", "9", "10","jack","queen", "king"]

有限狀態機

.onChange(of: gaming, perform: { newValue in
switch newValue{
case 0: message = "開始遊戲"
case 1: message = "棄牌"
playerList[0].isNoCard = false
playerList[1].isNoCard = false
playerList[2].isNoCard = false
playerList[3].isNoCard = false
gamerChooseComputer = 1
order = 0
washCard()
dropCard1()
case 2:
if playerList[1].isNoCard == true && playerList[2].isNoCard == true && playerList[3].isNoCard == true {
gaming = 6
return
}
if playerList[0].isNoCard == true{
gaming = 5
return
}
message = "玩家抽牌"
gamerChooseComputer = selectNextPlayer(current: 0)
showGetCard = true
case 3:
showGetCard = false
message = "抽牌"
chooseAndDrop(player1: 0, player2: gamerChooseComputer, card: selectedCard, nextStep: {
gaming = 4
})
case 4:
showGetCard = false
message = "電腦抽牌"
let next = selectNextPlayer(current: 0)
if next == 4{
gaming = 6
return
}
let nextDrop = selectNextPlayer(current: next)
if nextDrop == 4{
gaming = 6
return
}
print("next:\(next)")
print("nextdrop:\(nextDrop)")
computerChooseCard(i: next, next: nextDrop)
case 5:
money = money + 10
showGetCard = false
message = "勝利"
isShowGameWin = true
case 6:
money = money - 50
if money <= 0{
gaming = 7
return
}
showGetCard = false
message = "失敗"
isShowGameLose = true
case 7:
showGetCard = false
message = "遊戲結束"
default: message = ""
}
}