練習三.世界之最-選擇題

大致重點如下

struct的運用

使用shuffled使題目亂數

透過performsegue控制到下一頁的觸發條件

藉由Segue將資料傳至下個頁面

小提醒segue可從controller上方用滑鼠按著拉至第二頁面

創了兩個swift分別寫入建構子

import Foundation
struct QnaScore {
let score: Int
}

import Foundation
struct qna {
let question : String
let answer : String
let choice : [String]
}

執行選擇題的頁面(controller) 程式碼如下

import UIKit
class ViewController: UIViewController {
@IBOutlet weak var questionLabel: UILabel!
@IBOutlet weak var roundLabel: UILabel!
@IBOutlet var choiceButton: [UIButton]!
@IBOutlet weak var answerIsRightOrWrong: UILabel!
@IBOutlet weak var finalScore: UILabel!
//    @IBOutlet weak var endButton: UIButton!
var topics = [
qna(question: "世界上最大的動物", answer: "藍鯨", choice: ["大象","大白鯊","犀牛","藍鯨"]),
qna(question: "世界現存體型最大的爬行動物", answer: "鹹水鱷", choice: ["射紋龜","科莫多龍","鹹水鱷","黑刺尾鬣蜥"]),
qna(question: "世界上哪個國家最小", answer: "梵蒂岡", choice: ["梵蒂岡","衣索比亞","新加坡","瑞士"]),
qna(question: "世界現存最大的飛鳥", answer: "信天翁", choice: ["安地斯禿鷹","非洲鴕鳥","信天翁","疣鼻天鵝"]),
qna(question: "世界上最小的鳥", answer: "吸蜜蜂鳥", choice: ["麻雀","七彩文鳥","吸蜜蜂鳥","奇異鳥(KiWiBird)"]),
qna(question: "世界上最有錢的國家", answer: "卡達", choice: ["卡達","阿拉伯聯合大公園","盧森堡","挪威"]),
qna(question: "世界上最窮的國家", answer: "辛巴威", choice: ["阿富汗","索馬尼亞","海地共和國","辛巴威"]),
qna(question: "世界上最北的國家", answer: "挪威", choice: ["俄羅斯","阿拉斯加","冰島","挪威"]),
qna(question: "世界上最高的國家", answer: "賴索托", choice: ["瑞士","不丹","賴索托","中國"]),
qna(question: "世界上海拔最低的國家", answer: "荷蘭", choice: ["日本","馬爾地夫","荷蘭","希臘"])
]
var choices:[String] = [] // 目前的題目選項陣列
var totalScore:Int = 0 // 分數
var top:qna? // 目前的題目物件
var test:[Int] = [] // 題庫的出題順序
var count = 0 // 算目前第幾題
let roundString = [ "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" ] // 題號以中文表示
override func viewDidLoad() {
super.viewDidLoad()
let num = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
test = num.shuffled()
changeQuestion()
//        endButton.isEnabled = false
}
// 當按下答案即執行
@IBAction func choice(_ sender: UIButton) {
//代表所選button是array的第幾個成員
let number = choiceButton.firstIndex(of: sender)
if ( choiceButton[number!].currentTitle == top!.answer ) {
totalScore += 10
finalScore.text = String(totalScore)
answerIsRightOrWrong.text = String("答對了！🥳👍🏽")
}
else {
answerIsRightOrWrong.text = String("答錯ㄌ！🤨🖕🏻")
}
count += 1
if count < 10 {
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
self.changeQuestion()
}
}
else {
//            endButton.isEnabled = true
performSegue(withIdentifier: "showPage2", sender: self)
}
}
// 更新題目
func changeQuestion() {
top = topics[test[count]]
roundLabel.text =  roundString[count]
questionLabel.text = top!.question
choices = top!.choice.shuffled()
choiceButton[0].setTitle(choices[0], for: .normal)
choiceButton[1].setTitle(choices[1], for: .normal)
choiceButton[2].setTitle(choices[2], for: .normal)
choiceButton[3].setTitle(choices[3], for: .normal)
}
// 重新計算與遊戲
@IBAction func restart(_ sender: Any) {
let num = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
test = num.shuffled()
count = 0
totalScore = 0
finalScore.text = String(totalScore)
answerIsRightOrWrong.text = String("")
changeQuestion()
}
@IBSegueAction func showResult(_ coder: NSCoder) -> ResultViewController? {
let controller = ResultViewController(coder: coder)
let finalScore = totalScore
controller?.score = QnaScore(score: finalScore)
return controller
}
}

顯示最後分數的頁面(controller)程式碼如下

import UIKit
class ViewController: UIViewController {
@IBOutlet weak var questionLabel: UILabel!
@IBOutlet weak var roundLabel: UILabel!
@IBOutlet var choiceButton: [UIButton]!
@IBOutlet weak var answerIsRightOrWrong: UILabel!
@IBOutlet weak var finalScore: UILabel!
//    @IBOutlet weak var endButton: UIButton!
var topics = [
qna(question: "世界上最大的動物", answer: "藍鯨", choice: ["大象","大白鯊","犀牛","藍鯨"]),
qna(question: "世界現存體型最大的爬行動物", answer: "鹹水鱷", choice: ["射紋龜","科莫多龍","鹹水鱷","黑刺尾鬣蜥"]),
qna(question: "世界上哪個國家最小", answer: "梵蒂岡", choice: ["梵蒂岡","衣索比亞","新加坡","瑞士"]),
qna(question: "世界現存最大的飛鳥", answer: "信天翁", choice: ["安地斯禿鷹","非洲鴕鳥","信天翁","疣鼻天鵝"]),
qna(question: "世界上最小的鳥", answer: "吸蜜蜂鳥", choice: ["麻雀","七彩文鳥","吸蜜蜂鳥","奇異鳥(KiWiBird)"]),
qna(question: "世界上最有錢的國家", answer: "卡達", choice: ["卡達","阿拉伯聯合大公園","盧森堡","挪威"]),
qna(question: "世界上最窮的國家", answer: "辛巴威", choice: ["阿富汗","索馬尼亞","海地共和國","辛巴威"]),
qna(question: "世界上最北的國家", answer: "挪威", choice: ["俄羅斯","阿拉斯加","冰島","挪威"]),
qna(question: "世界上最高的國家", answer: "賴索托", choice: ["瑞士","不丹","賴索托","中國"]),
qna(question: "世界上海拔最低的國家", answer: "荷蘭", choice: ["日本","馬爾地夫","荷蘭","希臘"])
]
var choices:[String] = [] // 目前的題目選項陣列
var totalScore:Int = 0 // 分數
var top:qna? // 目前的題目物件
var test:[Int] = [] // 題庫的出題順序
var count = 0 // 算目前第幾題
let roundString = [ "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" ] // 題號以中文表示
override func viewDidLoad() {
super.viewDidLoad()
let num = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
test = num.shuffled()
changeQuestion()
//        endButton.isEnabled = false
}
// 當按下答案即執行
@IBAction func choice(_ sender: UIButton) {
//代表所選button是array的第幾個成員
let number = choiceButton.firstIndex(of: sender)
if ( choiceButton[number!].currentTitle == top!.answer ) {
totalScore += 10
finalScore.text = String(totalScore)
answerIsRightOrWrong.text = String("答對了！🥳👍🏽")
}
else {
answerIsRightOrWrong.text = String("答錯ㄌ！🤨🖕🏻")
}
count += 1
if count < 10 {
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
self.changeQuestion()
}
}
else {
//            endButton.isEnabled = true
performSegue(withIdentifier: "showPage2", sender: self)
}
}
// 更新題目
func changeQuestion() {
top = topics[test[count]]
roundLabel.text =  roundString[count]
questionLabel.text = top!.question
choices = top!.choice.shuffled()
choiceButton[0].setTitle(choices[0], for: .normal)
choiceButton[1].setTitle(choices[1], for: .normal)
choiceButton[2].setTitle(choices[2], for: .normal)
choiceButton[3].setTitle(choices[3], for: .normal)
}
// 重新計算與遊戲
@IBAction func restart(_ sender: Any) {
let num = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
test = num.shuffled()
count = 0
totalScore = 0
finalScore.text = String(totalScore)
answerIsRightOrWrong.text = String("")
changeQuestion()
}
@IBSegueAction func showResult(_ coder: NSCoder) -> ResultViewController? {
let controller = ResultViewController(coder: coder)
let finalScore = totalScore
controller?.score = QnaScore(score: finalScore)
return controller
}
}