如何在Firebase中添加字符串数组，然后将其取回？

Question

我做了一个简单的应用程序来做笔记。我将笔记存储在称为“数据”的数组中。 现在，我使用UserDefaults进行保存，可以正常工作。但是现在我想将其扩展为使用Firebase。

我该怎么做？

这是我保存和检索数据的tableViewController：

import UIKit
import Firebase


class TableViewControllers: UIViewController, UITableViewDataSource, UITableViewDelegate {


    @IBOutlet var table: UITableView!



    var data:[String] = []
    var selectedRow:Int = -1
    var newRowText:String = ""
    private let cellReuseIdentifier: String = "cell"
    let collection = Firestore.firestore().collection("notes")


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        table.dataSource = self
        table.delegate = self
        self.title = "Notes"
        self.navigationController?.navigationBar.prefersLargeTitles = true
        let addButton = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addNote))
        self.navigationItem.rightBarButtonItem = addButton
        self.navigationItem.leftBarButtonItem = editButtonItem
        load()
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        if selectedRow == -1 {
            return
        }
        data[selectedRow] = newRowText
        if newRowText == "" {
            data.remove(at: selectedRow)
        }
        table.reloadData()
        save()
    }

    @objc func addNote() {
        if table.isEditing {
            return
        }
        let name:String = ""
        data.insert(name, at: 0)
        let indexPath:IndexPath = IndexPath(row: 0, section: 0)
        table.insertRows(at: [indexPath], with: .automatic)
        table.selectRow(at: indexPath, animated: true, scrollPosition: .none)
        self.performSegue(withIdentifier: "detail", sender: nil)
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return data.count
    }



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

    override func setEditing(_ editing: Bool, animated: Bool) {
        super.setEditing(editing, animated: animated)
        table.setEditing(editing, animated: animated)
    }

    internal func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
        data.remove(at: indexPath.row)
        table.deleteRows(at: [indexPath], with: .fade)
        save()
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        self.performSegue(withIdentifier: "detail", sender: nil)
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let detailView:ViewController = segue.destination as! ViewController
        selectedRow = table.indexPathForSelectedRow!.row
        detailView.masterView = self
        detailView.setText(t: data[selectedRow])
    }

    func save() {
       UserDefaults.standard.set(data, forKey: "notes")
        for dat in data {
          //  collection.addDocument(data: dat)
            print(dat)
        }

    }

    func load() {
        if let loadedData:[String] = UserDefaults.standard.value(forKey: "notes") as? [String] {
            data = loadedData
            table.reloadData()
        }
    }
    }