新Swiftで行こう…第１３回「トランプ３」 田部井保
無限ループを防ぐ方法はいろいろあると思いますが、僕が思いついたのは、カードの残り枚数を数えて、0になったらリセットするという方法と、使ったかどうかで、全部使っているかチェックして使っていたらリセットするという方法です。サンプルを示します。
カードの残り枚数を数える。以下ソースコードです。
//
// ViewController.swift
// Card
//
// Created by 保 Tabei on 2024/09/01.
//
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lblCard: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let mark: [String] = ["♣️","♦️","❤️","♠️"]
let number: [String] = ["A","2","3","4","5","6","7","8","9","T","J","Q","K"]
enum EnumCard {
static let Count = 53
}
var rest = EnumCard.Count
var check: [Bool] = [Bool](repeating: false, count: EnumCard.Count)
@IBAction func btnGoTouch(_ sender: Any) {
if rest == 0 {
for i in 0 ..< EnumCard.Count
{
check[i] = false
}
rest = EnumCard.Count
let alert = UIAlertController()
alert.title = "初期化"
alert.message = "カードを配り直します"
alert.addAction(UIAlertAction(title: "OK", style: .default))
present(alert, animated: true, completion: nil)
}
var card:Int
repeat {
card = Int.random(in: 0 ..< EnumCard.Count)
} while check[card]
check[card] = true
rest -= 1
if card == EnumCard.Count - 1 {
lblCard.text = "JK"
} else {
lblCard.text = mark[card / 13] + number[card % 13]
}
}
}２巡目の最初のカードが初期化アラートが出た時にもう出てしまっているのを防ごうと思います。
//
// ViewController.swift
// Card
//
// Created by 保 Tabei on 2024/09/01.
//
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lblCard: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let mark: [String] = ["♣️","♦️","❤️","♠️"]
let number: [String] = ["A","2","3","4","5","6","7","8","9","T","J","Q","K"]
enum EnumCard {
static let Count = 53
}
var rest = EnumCard.Count
var check: [Bool] = [Bool](repeating: false, count: EnumCard.Count)
@IBAction func btnGoTouch(_ sender: Any) {
if rest == 0 {
for i in 0 ..< EnumCard.Count
{
check[i] = false
}
rest = EnumCard.Count
let alert = UIAlertController()
alert.title = "初期化"
alert.message = "カードを配り直します"
alert.addAction(UIAlertAction(title: "OK", style: .default))
present(alert, animated: true, completion: nil)
}
else
{
var card:Int
repeat {
card = Int.random(in: 0 ..< EnumCard.Count)
} while check[card]
check[card] = true
rest -= 1
if card == EnumCard.Count - 1 {
lblCard.text = "JK"
} else {
lblCard.text = mark[card / 13] + number[card % 13]
}
}
}
} 全部使っているかチェックするバージョンです。この場合は全部チェックするので、数を間違えて無限ループに入る心配はありません。
以下ソースコードです。
//
// ViewController.swift
// Card
//
// Created by 保 Tabei on 2024/09/01.
//
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lblCard: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let mark: [String] = ["♣️","♦️","❤️","♠️"]
let number: [String] = ["A","2","3","4","5","6","7","8","9","T","J","Q","K"]
enum EnumCard {
static let Count = 53
}
var check: [Bool] = [Bool](repeating: false, count: EnumCard.Count)
@IBAction func btnGoTouch(_ sender: Any) {
var chk: Bool = true
for i in 0 ..< EnumCard.Count {
chk = check[i]
if chk == false {
break
}
}
if chk {
for i in 0 ..< EnumCard.Count
{
check[i] = false
}
let alert = UIAlertController()
alert.title = "初期化"
alert.message = "カードを配り直します"
alert.addAction(UIAlertAction(title: "OK", style: .default))
present(alert, animated: true, completion: nil)
}
else
{
var card:Int
repeat {
card = Int.random(in: 0 ..< EnumCard.Count)
} while check[card]
check[card] = true
if card == EnumCard.Count - 1 {
lblCard.text = "JK"
} else {
lblCard.text = mark[card / 13] + number[card % 13]
}
}
}
}カードの残り枚数を数えて表示するようにしました。ラベルを画面に一つ追加して下さい。画面が出ているブロックを選んで上のViewメニューShow Libraryで出てくるものから画面にドラッグ＆ドロップします。
//
// ViewController.swift
// Card
//
// Created by 保 Tabei on 2024/09/01.
//
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lblCard: UILabel!
@IBOutlet weak var lblCount: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let mark: [String] = ["♣️","♦️","❤️","♠️"]
let number: [String] = ["A","2","3","4","5","6","7","8","9","T","J","Q","K"]
enum EnumCard {
static let Count = 53
}
var check: [Bool] = [Bool](repeating: false, count: EnumCard.Count)
var count = EnumCard.Count
@IBAction func btnGoTouch(_ sender: Any) {
var chk: Bool = true
for i in 0 ..< EnumCard.Count {
chk = check[i]
if chk == false {
break
}
}
if chk {
for i in 0 ..< EnumCard.Count
{
check[i] = false
}
let alert = UIAlertController()
alert.title = "初期化"
alert.message = "カードを配り直します"
alert.addAction(UIAlertAction(title: "OK", style: .default))
present(alert, animated: true, completion: nil)
count = EnumCard.Count
}
else
{
count -= 1
lblCount.text = count.description
var card:Int
repeat {
card = Int.random(in: 0 ..< EnumCard.Count)
} while check[card]
check[card] = true
if card == EnumCard.Count - 1 {
lblCard.text = "JK"
} else {
lblCard.text = mark[card / 13] + number[card % 13]
}
}
}
}この場合は、カードの残り枚数を数えていた方がすんなりいきます。
//
// ViewController.swift
// Card
//
// Created by 保 Tabei on 2024/09/01.
//
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lblCard: UILabel!
@IBOutlet weak var lblCount: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let mark: [String] = ["♣️","♦️","❤️","♠️"]
let number: [String] = ["A","2","3","4","5","6","7","8","9","T","J","Q","K"]
enum EnumCard {
static let Count = 53
}
var check: [Bool] = [Bool](repeating: false, count: EnumCard.Count)
var count = EnumCard.Count
@IBAction func btnGoTouch(_ sender: Any) {
if count == 0 {
for i in 0 ..< EnumCard.Count
{
check[i] = false
}
let alert = UIAlertController()
alert.title = "初期化"
alert.message = "カードを配り直します"
alert.addAction(UIAlertAction(title: "OK", style: .default))
present(alert, animated: true, completion: nil)
count = EnumCard.Count
}
else
{
count -= 1
lblCount.text = count.description
var card:Int
repeat {
card = Int.random(in: 0 ..< EnumCard.Count)
} while check[card]
check[card] = true
if card == EnumCard.Count - 1 {
lblCard.text = "JK"
} else {
lblCard.text = mark[card / 13] + number[card % 13]
}
}
}
}とりあえず♣️だけ、全13枚が配られるか分かるソースコードにしてみます。ラベルを並べるだけでも結構面倒です。
//
// ViewController.swift
// Card
//
// Created by 保 Tabei on 2024/09/01.
//
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lblCard: UILabel!
@IBOutlet weak var lblCount: UILabel!
@IBOutlet weak var lblKA: UILabel!
@IBOutlet weak var lblK2: UILabel!
@IBOutlet weak var lblK3: UILabel!
@IBOutlet weak var lblK4: UILabel!
@IBOutlet weak var lblK5: UILabel!
@IBOutlet weak var lblK6: UILabel!
@IBOutlet weak var lblK7: UILabel!
@IBOutlet weak var lblK8: UILabel!
@IBOutlet weak var lblK9: UILabel!
@IBOutlet weak var lblKT: UILabel!
@IBOutlet weak var lblKJ: UILabel!
@IBOutlet weak var lblKQ: UILabel!
@IBOutlet weak var lblKK: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let mark: [String] = ["♣️","♦️","❤️","♠️"]
let number: [String] = ["A","2","3","4","5","6","7","8","9","T","J","Q","K"]
enum EnumCard {
static let Count = 13
}
var check: [Bool] = [Bool](repeating: false, count: EnumCard.Count)
var count = EnumCard.Count
@IBAction func btnGoTouch(_ sender: Any) {
if count == 0 {
for i in 0 ..< EnumCard.Count
{
check[i] = false
}
lblKA.text = ""
lblK2.text = ""
lblK3.text = ""
lblK4.text = ""
lblK5.text = ""
lblK6.text = ""
lblK7.text = ""
lblK8.text = ""
lblK9.text = ""
lblKT.text = ""
lblKJ.text = ""
lblKQ.text = ""
lblKK.text = ""
let alert = UIAlertController()
alert.title = "初期化"
alert.message = "カードを配り直します"
alert.addAction(UIAlertAction(title: "OK", style: .default))
present(alert, animated: true, completion: nil)
count = EnumCard.Count
}
else
{
count -= 1
lblCount.text = count.description
var card:Int
repeat {
card = Int.random(in: 0 ..< EnumCard.Count)
} while check[card]
check[card] = true
if card == 52 {
lblCard.text = "JK"
} else {
lblCard.text = mark[card / 13] + number[card % 13]
}
switch card {
case 0: lblKA.text = lblCard.text
case 1: lblK2.text = lblCard.text
case 2: lblK3.text = lblCard.text
case 3: lblK4.text = lblCard.text
case 4: lblK5.text = lblCard.text
case 5: lblK6.text = lblCard.text
case 6: lblK7.text = lblCard.text
case 7: lblK8.text = lblCard.text
case 8: lblK9.text = lblCard.text
case 9: lblKT.text = lblCard.text
case 10: lblKJ.text = lblCard.text
case 11: lblKQ.text = lblCard.text
default: lblKK.text = lblCard.text
}
}
}
}ここで８５行目は
if card == EnumCard.Count - 1 {
となっていたのですが、EnumCard.Countを１３にしたので、１２（♣️K）の時にJKとなってしまいます。ここは５２に戻すべきでしょう。
実行してみましょう。重複無く配られましたか?
さて問題です。今は、０〜１２のランダムな数を発生させて、もし既に出ていたら、もう一度乱数を発生させるという方法を取っています。１３枚なら大した事はないのですが、５３枚だとある程度、不発が増えて来ます。最近のコンピュータは、演算速度が早いので問題にはなりませんが、少々気持ち悪いものです。既に一度出ているのでもう一度乱数を発生させるというのを止めさせる事は出来ないでしょうか？５３枚だと枚数が多いので、♣️を１３枚並べるようにした事で、何かソースコードに問題があった時に、発見しやすいという理由で、今回の最後のソースコードを元にして下さい。
