如何將 Firestore 連接到我的 Firebase 應用

Question

互聯網上到處都是關於這方面的教程使用舊版本的swift，它使用場景委托和應用程序委托文件

如何將簡單的 Firestore 連接到我的 Firebase 應用

這是我的代碼不起作用：

Firestoremanager.swift

import FirebaseFirestore
import FirebaseFirestoreSwift
import Combine

import Firebase

class FirestoreManager: ObservableObject {
    @Published var restaurant: String = ""
    func fetchRecipie() {
        let db = Firestore.firestore()

        let docRef = db.collection("Recipies").document("recipie")

        docRef.getDocument { (document, error) in
            guard error == nil else {
                print("error", error ?? "")
                return
            }

            if let document = document, document.exists {
                let data = document.data()
                if let data = data {
                    print("data", data)
                    self.restaurant = data["name"] as? String ?? ""
                }
            }

        }
    }
    
    func FetchAllRecipies() {
            let db = Firestore.firestore()

            db.collection("Recipies").getDocuments() { (querySnapshot, error) in
                            if let error = error {
                                    print("Error getting documents: \(error)")
                            } else {
                                    for document in querySnapshot!.documents {
                                            print("\(document.documentID): \(document.data())")
                                    }
                            }
            }
    }
    init() {
        FetchAllRecipies()
    }

}

RecipieApp.swift

import SwiftUI
import Firebase

@main

struct RecipyApp: App{
    
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    @StateObject var firestoreManager = FirestoreManager()//I try to connect here
    
    var body: some Scene{
        let viewModel = AppViewModel()
        WindowGroup{
            ContentView()
                .environmentObject(viewModel)
                .environmentObject(firestoreManager)
                
        }
        
    }
    
}

class AppDelegate: NSObject, UIApplicationDelegate{
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        
        FirebaseApp.configure()
        
        
        return true
        
    }
}

然后當我在主視圖文件中運行Text("My restaurant: \\(firestoreManager.recipie)")

我收到一個錯誤

“實例方法‘appendInterpolation’要求‘綁定’符合‘_FormatSpecifiable’”

我怎樣才能克服這個錯誤？

Answer 1

在你的@main結構中輸入：

init() {
    FirebaseApp.configure()
}

這就是你需要做的一切