CS193p 2021 #3 MVVM

影片

課程範例

model，MemoryGame.swift

import Foundation
struct MemoryGame<CardContent> {
    private(set) var cards: Array<Card>
    
    func choose(_ card: Card) {
        
    }
    
    init(numberOfPairsOfCards: Int, createCardContent: (Int) -> CardContent) {
        cards = Array<Card>()
        for pairIndex in 0..<numberOfPairsOfCards {
            let content = createCardContent(pairIndex)
            cards.append(Card(content: content))
            cards.append(Card(content: content))
        }
    }
    
    struct Card {
        var isFaceUp = true
        var isMatched = false
        var content: CardContent
    }
}

view model，EmojiMemoryGame.swift

import Foundation
class EmojiMemoryGame {
    
    static let emojis = ["🚲", "🚂", "🚁", "🚜", "🚕", "🏎", "🚑", "🚓", "🚒", "✈️", "🚀", "⛵️", "🛸", "🛶", "🚌", "🏍", "🛺", "🚠", "🛵", "🚗", "🚚", "🚇", "🛻", "🚝"]
    
    static func createMemoryGame() -> MemoryGame<String> {
        MemoryGame<String>(numberOfPairsOfCards: 4) { pairIndex in
            emojis[pairIndex]
        }
    }
    
    private var model = createMemoryGame()
    
    var cards: Array<MemoryGame<String>.Card> {
        return model.cards
    }
}

view，ContentView.swift

尚未調整，程式同 Lecture 2。在 Lecture 4 時 view 將串接 view mode。

CS193p 2021 #2 Learning More about SwiftUI