如何实现两个xib单元和单个单元。数组计数为零，显示为空，否则显示为数据单元格

// EmptyCell.swift
import UIKit

class EmptyCell: UITableViewCell {
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        loadNib()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        loadNib()
    }
    
    private func loadNib() {
        guard let view = Bundle.main.loadNibNamed("EmptyCell", owner: self, options: nil)?.first as? UIView else {
            return
        }
        view.frame = self.contentView.bounds
        self.contentView.addSubview(view)
    }
}

// DataCell.swift
import UIKit

class DataCell: UITableViewCell {
    @IBOutlet weak var dataLabel: UILabel!
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        loadNib()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        loadNib()
    }
    
    private func loadNib() {
        guard let view = Bundle.main.loadNibNamed("DataCell", owner: self, options: nil)?.first as? UIView else {
            return
        }
        view.frame = self.contentView.bounds
        self.contentView.addSubview(view)
    }
}

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
    @IBOutlet weak var tableView: UITableView!
    
    var dataArray: [String] = [] // 示例数据数组
    
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.dataSource = self
        tableView.delegate = self
        tableView.register(EmptyCell.self, forCellReuseIdentifier: "EmptyCell")
        tableView.register(DataCell.self, forCellReuseIdentifier: "DataCell")
    }
    
    // MARK: - UITableViewDataSource
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return dataArray.count > 0 ? dataArray.count : 1
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if dataArray.count == 0 {
            let cell = tableView.dequeueReusableCell(withIdentifier: "EmptyCell", for: indexPath) as! EmptyCell
            return cell
        } else {
            let cell = tableView.dequeueReusableCell(withIdentifier: "DataCell", for: indexPath) as! DataCell
            cell.dataLabel.text = dataArray[indexPath.row]
            return cell
        }
    }
}