我应该如何从火库中检索数据到UICollectionViewCell？

import UIKit
import Firebase

class MyViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
    var collectionView: UICollectionView!
    var data: [String] = []
    var databaseRef: DatabaseReference!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 初始化Firebase数据库引用
        databaseRef = Database.database().reference()
        
        // 创建UICollectionView布局
        let layout = UICollectionViewFlowLayout()
        // 设置布局属性
        
        // 初始化UICollectionView
        collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
        collectionView.dataSource = self
        collectionView.delegate = self
        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        view.addSubview(collectionView)
        
        // 从Firebase中检索数据
        retrieveDataFromFirebase()
    }
    
    func retrieveDataFromFirebase() {
        // 构建查询对象
        let query = databaseRef.child("your_collection")
        
        // 监听数据变化
        query.observe(.value) { [weak self] (snapshot) in
            guard let self = self else { return }
            
            // 清空旧数据
            self.data.removeAll()
            
            // 解析快照中的数据
            for child in snapshot.children {
                if let snapshot = child as? DataSnapshot,
                   let value = snapshot.value as? String {
                    self.data.append(value)
                }
            }
            
            // 刷新UICollectionView
            self.collectionView.reloadData()
        }
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return data.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)
        
        // 设置UICollectionViewCell的内容
        cell.textLabel.text = data[indexPath.item]
        
        return cell
    }
}