Swift Firebase snapshot.allValues更新

import Firebase

class YourViewController: UIViewController {
    var ref: DatabaseReference!
    var dataDictionary: [String: AnyObject] = [:]

    override func viewDidLoad() {
        super.viewDidLoad()
        
        ref = Database.database().reference(withPath: "your_node_path")
        
        // 监听数据变化
        ref.observe(.value, with: { snapshot in
            self.updateUI(with: snapshot)
        })
    }
    
    func updateUI(with snapshot: DataSnapshot) {
        // 更新数据字典
        dataDictionary = snapshot.value as? [String: AnyObject] ?? [:]
        
        // 更新UI
        DispatchQueue.main.async {
            // 假设你有一个UITableView
            self.tableView.reloadData()
        }
    }
}

func updateUI(with snapshot: DataSnapshot) {
    // 更新数据字典
    dataDictionary = snapshot.value as? [String: AnyObject] ?? [:]
    
    // 更新UITableView
    DispatchQueue.main.async {
        self.tableView.reloadData()
    }
}

func updateUI(with snapshot: DataSnapshot) {
    for child in snapshot.children {
        if let snap = child as? DataSnapshot,
           let key = snap.key,
           let value = snap.value as? [String: AnyObject] {
            // 更新特定数据项
            dataDictionary[key] = value
            
            // 更新特定的UI组件
            if let indexPath = IndexPath(row: Int(key)!, inSection: 0),
               let cell = tableView.cellForRow(at: indexPath) as? YourCustomCell {
                // 更新单元格
                cell.update(with: value)
            }
        }
    }
}