PeterPanSwift

//
//  ContentView.swift
//  Demo
//
//  Created by SHIH-YING PAN on 2025/5/24.
//

import SwiftUI

struct ContentView: View {

PeterPanSwift

當然可以！我們可以用《小王子》B612 星球的故事，來幫助初學者理解 Swift 的 Optional 概念——這個在 Swift 中很重要，但剛開始學時常讓人困惑的語法。

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🪐 B612 星球與 Optional 的故事

你是否記得《小王子》中，小王子住在一個小小的星球——B612？在他的星球上，什麼都有可能存在：有時只有一朵玫瑰花，有時卻什麼也沒有。有一天，小王子想知道自己的星球上有沒有玫瑰花。

在 Swift 語言裡，Optional 就像這個問題：

PeterPanSwift

import SwiftUI

struct ContentView: View {
    @State private var guessNumberText = ""
    @State private var showResult = false
    @State private var result = ""
    @State private var guessWrongCount = 0
    @State private var answer = Int.random(in: 1...100)
    @State private var upperBound = 100
    @State private var lowerBound = 1

PeterPanSwift

import SwiftUI

struct ContentView: View {
    @State private var guessNumberText = ""
    @State private var showResult = false
    @State private var result = ""
    @State private var guessWrongCount = 0
    @State private var answer = Int.random(in: 1...100)
    @State private var upperBound = 100

PeterPanSwift

import SwiftUI

struct ContentView: View {
    @State private var questions = [
        Question(text: "吸血鬼最害怕什麼物品？", answer: "大蒜和十字架"),
        Question(text: "德古拉伯爵是哪個國家的吸血鬼？", answer: "羅馬尼亞"),
        Question(text: "吸血鬼在傳說中無法在什麼物品中看到自己？", answer: "鏡子"),
    ]
    @State private var currentQuestionIndex = 0
    @State private var showAnswer = false

PeterPanSwift

import SwiftUI

struct ContentView: View {
    @State private var questions = [
        Question(text: "吸血鬼最害怕什麼物品？", answer: "大蒜和十字架"),
        Question(text: "德古拉伯爵是哪個國家的吸血鬼？", answer: "羅馬尼亞"),
        Question(text: "吸血鬼在傳說中無法在什麼物品中看到自己？", answer: "鏡子"),
    ]
    @State private var currentQuestionIndex = 0

PeterPanSwift

import SwiftUI

struct ContentView: View {
    @State private var questions = [
        Question(text: "吸血鬼最害怕什麼物品？", answer: "大蒜和十字架"),
        Question(text: "德古拉伯爵是哪個國家的吸血鬼？", answer: "羅馬尼亞"),
        Question(text: "吸血鬼在傳說中無法在什麼物品中看到自己？", answer: "鏡子"),
    ]
    @State private var currentQuestionIndex = 0
    @State private var showAnswer = false

PeterPanSwift

import SwiftUI

struct ContentView: View {
    let questions = [
        Question(text: "吸血鬼最害怕什麼物品？", answer: "大蒜和十字架"),
        Question(text: "德古拉伯爵是哪個國家的吸血鬼？", answer: "羅馬尼亞"),
        Question(text: "吸血鬼在傳說中無法在什麼物品中看到自己？", answer: "鏡子"),
    ]
    @State private var currentQuestionIndex = 0
    @State private var showAnswer = false

PeterPanSwift

import SwiftUI

struct ContentView: View {
    let questions = [
        Question(text: "吸血鬼最害怕什麼物品？", answer: "大蒜和十字架"),
        Question(text: "德古拉伯爵是哪個國家的吸血鬼？", answer: "羅馬尼亞"),
        Question(text: "吸血鬼在傳說中無法在什麼物品中看到自己？", answer: "鏡子"),
    ]
    @State private var currentQuestionIndex = 0

PeterPanSwift

//
//  ContentView.swift
//  Demo
//
//  Created by SHIH-YING PAN on 2025/4/26.
//

import SwiftUI

// 問題結構