Swift|22 撲克牌比大小遊戲

使用元件

• Image View
• Label
• Button
• Stepper

遊戲玩法

• 撲克牌A最小，K最大
• 玩家原本有一千元，猜對增加一百元，猜錯減少一百元
• 玩家可以決定壓注的金額
• 金額在零或零以下遊戲結束
• 按Replay重新開始遊戲

定義撲克牌型別

把花色(suit)和數字大小(rank)分不同的array

import Foundation
struct Card {
var suit:String
var rank:String
}
let suits = ["♣️", "♦️", "♥️", "♠️"]
let ranks = ["A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"]

把變數或常數放在最外面，全部地方都可以使用

拉IBOutlet & IBAction

import UIKit
class ViewController: UIViewController {
@IBOutlet weak var computerCardLabel: UILabel!
@IBOutlet weak var playerCardLabel: UILabel!
@IBOutlet weak var resultLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
@IBAction func play(_ sender: Any) {
}

寫一個撲克牌的Array，裡面沒有裝東西

52張牌的兩層Loop寫法(Nested Loop)

var cards = [Card]()

func creatCards(){
for suit in suits {
for rank in ranks {
let card = Card(suit: suit, rank: rank)
cards.append(card)
}
}
}

在ViewDidLoad呼叫出撲克牌

override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
creatCards()
}

Play按下去之後

先洗牌(shuffle)
第一張牌先發給電腦
第二張牌再發給玩家

cards.shuffle()
let computerCard = cards[0]
computerCardLabel.text = "\(computerCard.suit) \(computerCard.rank)"
let playerCard = cards[1]
playerCardLabel.text = "\(playerCard.suit) \(playerCard.rank)"

用 if else 來比大小

因為電腦會用字串來比大小
英文字母排列J<K<Q
所以我們要幫撲克牌打分數來比大小
設A為最小，J為11，Q為12，K為13

其他的數字用Int把字串轉數字
因為有可能是nil
所以使用optional

var compuerCardNumber = 0
if computerCard.rank == "A"{
compuerCardNumber = 1
}else if computerCard.rank == "J"{
compuerCardNumber = 11
}else if computerCard.rank == "Q"{
compuerCardNumber = 12
}else if computerCard.rank == "K"{
compuerCardNumber = 13
}else{
compuerCardNumber = Int(computerCard.rank)!
}
var playerCardNumber = 0
if playerCard.rank == "A"{
playerCardNumber = 1
}else if playerCard.rank == "J"{
playerCardNumber = 11
}else if playerCard.rank == "Q"{
playerCardNumber = 12
}else if playerCard.rank == "K"{
playerCardNumber = 13
}else{
playerCardNumber = Int(playerCard.rank)!
}

比完數字，再比花色

if compuerCardNumber < playerCardNumber{
resultLabel.text = "You Win"
}else if compuerCardNumber > playerCardNumber{
resultLabel.text = "You Lose"
}else {
var playerSuitNumber = 0
if playerCard.suit == "♣️"{
playerCardNumber = 1
}else if playerCard.suit == "♦️"{
playerCardNumber = 2
}else if playerCard.suit == "♥️"{
playerCardNumber = 3
}else{
playerCardNumber = 4
}
var computerSuitNumber = 0
if computerCard.suit == "♣️"{
compuerCardNumber = 1
}else if computerCard.suit == "♦️"{
compuerCardNumber = 2
}else if computerCard.suit == "♥️"{
compuerCardNumber = 3
}else{
compuerCardNumber = 4
}

輸贏後在結果欄中顯示文字，以及改變本金金額

if computerSuitNumber < playerSuitNumber {
resultLabel.text = "You Win!"
playerMoneyLabel.text = "\(playerMoney + bet)"
} else {
resultLabel.text = "You Lose"
playerMoneyLabel.text = "\(playerMoney - bet)"
}

本金少於等於0，遊戲結束

playerMoney = Int(playerMoneyLabel.text!)!
if playerMoney <= 0{
resultLabel.text = “Game Over!”
}

按Reset之後的顯示結果

@IBAction func reset(_ sender: Any) {
playerMoney = 10000
playerMoneyLabel.text = "\(playerMoney)"
bet = 1000
moneyLabel.text = "\(bet)"
computerCardLabel.text = ""
playerCardLabel.text = ""
resultLabel.text = ""
moneyStepper.value = 1
}

GitHub

https://github.com/ting3242006/BigSmall

參考資料

#48 骰子轉轉轉，比大小，骰子吹牛

Swift入門第014天-十賭九輸之骰子猜大小

#35 骰子轉轉轉，比大小，骰子吹牛

#46 給開司來罐啤酒！比大小骰子遊戲