基于TableView使用Firebase显示手动输入的数据

struct Message {
    let text: String
    let timestamp: Date
}

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}

import UIKit
import Firebase

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var tableView: UITableView!
    var messages: [Message] = []

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.dataSource = self
        tableView.delegate = self
        loadMessages()
    }

    func loadMessages() {
        guard let uid = Auth.auth().currentUser?.uid else { return }
        Database.database().reference().child("users").child(uid).child("messages").observe(.value, with: { snapshot in
            var newMessages: [Message] = []
            for child in snapshot.children {
                if let snapshot = child as? DataSnapshot,
                   let dict = snapshot.value as? [String: Any],
                   let text = dict["text"] as? String,
                   let timestamp = dict["timestamp"] as? TimeInterval {
                    let date = Date(timeIntervalSince1970: timestamp)
                    newMessages.append(Message(text: text, timestamp: date))
                }
            }
            self.messages = newMessages
            self.tableView.reloadData()
        })
    }

    // UITableViewDataSource methods
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return messages.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "MessageCell", for: indexPath)
        let message = messages[indexPath.row]
        cell.textLabel?.text = message.text
        return cell
    }
}

func saveMessage(text: String) {
    guard let uid = Auth.auth().currentUser?.uid else { return }
    let timestamp = Date().timeIntervalSince1970
    let messageData: [String: Any] = ["text": text, "timestamp": timestamp]
    Database.database().reference().child("users").child(uid).child("messages").childByAutoId().setValue(messageData)
}