按下按鈕時從JSON檔案生成隨機文本-SwiftUI

我想從按鈕呼叫的 json 檔案創建隨機文本生成器。此時我有隨機文本生成器，但要重繪 我需要回傳另一個視圖并打開相同的視圖。

我怎樣才能讓它通過按鈕重繪 ？我曾嘗試通過函式創建它，但每次我遇到很多錯誤......

ContentView 代碼（除了允許我運行此代碼的黑客 swift 代碼）

struct Quote: Codable {
        
        var text: String
        var author: String
        
        var shareMessage: String {
            return "\"\(text)\" - \(author)"
        }
    }
        
        struct PytaniaNormalne : View {
            @State private var quote : Quote?
            var body: some View {
                VStack {
                    if let quote = quote {
                        VStack {
                            VStack {
                                Text(quote.text)
                                    .font(.system(.title3))
                                    .foregroundColor(.white)
                                Text(quote.author)
                                    .font(.system(.title3))
                                    .foregroundColor(.white)
                            }
                        }.frame(width: 240)
                            .background(RoundedRectangle(cornerRadius: 7.0).fill(Color.blue))
                    }
                }.onAppear {
                    let quotes = Bundle.main.decode([Quote].self, from: "quotes.json")
                    quote = quotes.randomElement()
                    
                }
            }
        }

檔案

[
    {
        "text": "Pytanie 1",
        "author": "tekst"
    },
    {
        "text": "Pytanie 2",
        "author": "tekst"
    },
    {
        "text": "Pytanie 3",
        "author": "teskt"
    },
    {
        "text": "Pytanie 4",
        "author": "tekst"
    },
    {
        "text": "Pytanie 5",
        "author": "author"
    },
    {
        "text": "Pytanie 6",
        "author": "author"
    },
    {
        "text": "Pytanie 7",
        "author": "author"
    }
]

uj5u.com熱心網友回復：

如您所見，我在author Text. 每次您點擊它時，setRandomQuote都會呼叫它，為您的@Statevar 設定一個隨機參考，隨后將重新加載視圖。

struct PytaniaNormalne : View {
    @State private var quote : Quote?
    var body: some View {
        VStack {
            if let quote = quote {
                VStack {
                    VStack {
                        Text(quote.text)
                            .font(.system(.title3))
                            .foregroundColor(.white)
                        Text(quote.author)
                            .font(.system(.title3))
                            .foregroundColor(.white)
                        
                        Button(action: setRandomQuote) {
                            Text("Refresh")
                                .font(.system(.title3))
                                .foregroundColor(.white)
                                .padding()
                                .background {
                                    RoundedRectangle(cornerRadius: 8)
                                        .foregroundColor(.blue)
                                }
                        }

                    }
                }.frame(width: 240)
                    .background(RoundedRectangle(cornerRadius: 7.0).fill(Color.blue))
            }
        }.onAppear {
            setRandomQuote()
        }
    }
    
    private func setRandomQuote() {
        let quotes = Bundle.main.decode([Quote].self, from: "quotes.json")
        quote = quotes.randomElement()
    }
}

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