Content.swift

import SwiftUI

struct NewView: View {
    @State var showSetting = false
    //MARK: Properties
    @ObservedObject var session = ActivityModelFirebase()
    
    var body: some View {
        NavigationView{
            ScrollView {

                ForEach(self.session.activities){ a in
                    ListRowView(activity: a)
                }
                
            }
            
            .navigationTitle("Actus")
                .navigationBarItems(trailing: Button(action: {
                    self.showSetting.toggle()
                }, label: {
                    Image(systemName: "slider.horizontal.3")
                        .foregroundColor(.black)
                        .font(Font.system(size: 30))
                    
                }).fullScreenCover(isPresented: $showSetting, content: {
                    SettingView()
                }))
        }.onAppear(perform: {
            getActivities()
        })
    }
    func getActivities() {
        ActivityModelFirebase().getActivities()
    }
}