如何使用Firestore用SwiftUI制作动态视图

import Firebase
import FirebaseFirestore

FirebaseApp.configure()

let db = Firestore.firestore()
let collectionRef = db.collection("your_collection")
let documentRef = db.collection("your_collection").document("your_document")

// 读取数据
collectionRef.getDocuments { (snapshot, error) in
    if let error = error {
        print("Error getting documents: \(error)")
    } else {
        for document in snapshot!.documents {
            print("\(document.documentID) => \(document.data())")
        }
    }
}

// 写入数据
documentRef.setData(["field": "value"]) { (error) in
    if let error = error {
        print("Error writing document: \(error)")
    } else {
        print("Document successfully written!")
    }
}

// 监听数据变化
collectionRef.addSnapshotListener { (snapshot, error) in
    if let error = error {
        print("Error listening for changes: \(error)")
    } else {
        // 处理数据变化
    }
}