Widgets iOS 14 + SwiftUI + Firebase?

Je suis encore assez nouveau dans SwiftUI et Firebase. Récemment, en tant que passe-temps, j'ai développé une application pour mon école. Après le lancement de Xcode 12, j'ai décidé d'expérimenter les nouvelles fonctionnalités telles que les widgets. Cependant, depuis que mon application obtient ses données de Firebase, j'ai eu quelques problèmes. Mon problème le plus récent est ce "Thread 1:" Impossible d'obtenir l'instance FirebaseApp. Veuillez appeler FirebaseApp.configure () avant d'utiliser Firestore ". Je ne sais pas trop où placer" FirebaseApp.configure () "car il n'y a pas d'AppDelegate.swift pour le widget. Mon code est ci-dessous.

Edit: J'ai réorganisé mon code pour que j'obtienne maintenant les données du modèle de données d'application iOS d'origine. Je n’importe donc pas Firebase dans le fichier Swift des widgets. Cependant, j'obtiens toujours la même erreur ("SendProcessControlEvent: toPid: a rencontré une erreur: Error Domain = com.apple.dt.deviceprocesscontrolservice Code = 8" et "-> 0x7fff5bb6933a <+10>: jae 0x7fff5bb69344; <+20> - Thread 1: "Impossible d'obtenir l'instance FirebaseApp. Veuillez appeler FirebaseApp.configure () avant d'utiliser Firestore" "). J'ai également inclus le code de @Wendy Liga, mais j'ai toujours la même erreur. Mon nouveau code est ci-dessous:

Modèle de données d'application iOS

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

@main
struct AssessmentsWidget: Widget {
    
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    
    private let kind: String = "Assessments Widget"

    public var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: Provider(), placeholder: PlaceholderView()) { entry in
            AssessmentsWidgetEntryView(entry: entry)
        }
        .configurationDisplayName("Assessments Widget")
        .description("Keep track of your upcoming assessments.")
        .supportedFamilies([.systemMedium])
    }
}

Vue Widgets

struct WidgetsMainView: View {
    
    @ObservedObject private var viewModel = AssessmentsViewModel()
    
    var body: some View {
        HStack {
            Spacer().frame(width: 10)
            VStack(alignment: .leading) {
                Spacer().frame(height: 10)
                
                ForEach(self.viewModel.books) { Data in
                    HStack {
                        VStack {
                            Text(String(Data.Day))
                                .bold()
                                .font(.system(size: 25))
                            Text(Data.Month)
                        }
                        .padding(EdgeInsets(top: 16, leading: 17, bottom: 16, trailing: 17))
                        .background(Color(red: 114/255, green: 112/255, blue: 110/255))
                        .foregroundColor(Color.white)
                        .cornerRadius(10)
                        
                        VStack(alignment: .leading, spacing: 0) {
                            Text("\(Data.Subject) Crit \(Data.Crit.joined(separator: " + "))")
                                .bold()
                            if Data.Title != "" {
                                Text(Data.Title)
                            } else {
                                Text(Data.Class.joined(separator: ", "))
                            }
                        }
                        .padding(.leading, 10)
                    }
                }
                .onAppear {
                    viewModel.books.prefix(2)
                }
                
                Spacer()
            }
            Spacer()
        }
    }
}

Widgets @main

import Foundation
import SwiftUI
import Firebase
import FirebaseFirestore

struct Assessment: Identifiable {
    var id:String = UUID().uuidString
    var Subject:String
    var Class:Array<String>
    var Day:Int
    var Month:String
    var Title:String
    var Description:String
    var Link:String
    var Crit:Array<String>
}

class AssessmentsViewModel:ObservableObject {
    @Published var books = [Assessment]()
    
    private var db = Firestore.firestore()
    
    // Add assessment variables
    @Published var AssessmentSubject:String = ""
    //@Published var AssessmentClass:Array<String> = [""]
    @Published var AssessmentDay:Int = 1
    @Published var AssessmentMonth:String = "Jan"
    @Published var AssessmentTitle:String = ""
    @Published var AssessmentDescription:String = ""
    @Published var AssessmentLink:String = ""
    @Published var AssessmentCrit:Array<String> = [""]
    @Published var AssessmentDate:Date = Date()
    
    func fetchData() {
        db.collection("AssessmentsTest").order(by: "date").addSnapshotListener { (QuerySnapshot, error) in
            guard let documents = QuerySnapshot?.documents else {
                print("No documents")
                return
            }
            
            self.books = documents.map { (QueryDocumentSnapshot) -> Assessment in
                let data = QueryDocumentSnapshot.data()
                
                let Subject = data["subject"] as? String ?? ""
                let Class = data["class"] as? Array<String> ?? [""]
                let Day = data["day"] as? Int ?? 0
                let Month = data["month"] as? String ?? ""
                let Title = data["title"] as? String ?? ""
                let Description = data["description"] as? String ?? ""
                let Link = data["link"] as? String ?? ""
                let Crit = data["crit"] as? Array<String> ?? [""]
                
                return Assessment(Subject: Subject, Class: Class, Day: Day, Month: Month, Title: Title, Description: Description, Link: Link, Crit: Crit)
            }
        }
    }
    
    func writeData() {
        let DateConversion = DateFormatter()
        DateConversion.dateFormat = "DD MMMM YYYY"
        let Timestamp = DateConversion.date(from: "20 June 2020")
        
        db.collection("AssessmentsTest").document(UUID().uuidString).setData([
            "subject": AssessmentSubject,
            "month": AssessmentMonth,
            "day": AssessmentDay,
            "title": AssessmentTitle,
            "description": AssessmentDescription,
            "link": AssessmentLink,
            "crit": AssessmentCrit,
            "date": AssessmentDate
        ]) { err in
            if let err = err {
                print("Error writing document: \(err)")
            } else {
                print("Document successfully written!")
            }
        }
    }
}