将Firebase实时数据库与SwiftUI列表一起使用-清除列表

import SwiftUI
import Firebase

struct ContentView: View {
    @State private var items: [String] = []

    var body: some View {
        VStack {
            List {
                ForEach(items, id: \.self) { item in
                    Text(item)
                }
            }
            
            Button(action: {
                clearList()
            }) {
                Text("Clear List")
            }
        }
        .onAppear {
            initFirebase()
        }
    }
    
    func initFirebase() {
        FirebaseApp.configure()
        let ref = Database.database().reference()
        
        ref.observe(.value) { snapshot in
            var newItems: [String] = []
            
            for child in snapshot.children {
                if let snapshot = child as? DataSnapshot,
                   let item = snapshot.value as? String {
                    newItems.append(item)
                }
            }
            
            self.items = newItems
        }
    }
    
    func clearList() {
        let ref = Database.database().reference()
        ref.removeValue()
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}