如何在ios应用程序的UITextField下添加自动填充选项？

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {

    let textField = UITextField()
    var autoCompleteTableView: UITableView?
    var autoCompleteData = ["Option 1", "Option 2", "Option 3"] // 自动填充选项数据

    override func viewDidLoad() {
        super.viewDidLoad()
        
        textField.delegate = self
        textField.frame = CGRect(x: 50, y: 100, width: 200, height: 30)
        textField.borderStyle = .roundedRect
        view.addSubview(textField)
        
        autoCompleteTableView = UITableView(frame: CGRect(x: 50, y: 130, width: 200, height: 120))
        autoCompleteTableView?.delegate = self
        autoCompleteTableView?.dataSource = self
        autoCompleteTableView?.isHidden = true
        view.addSubview(autoCompleteTableView!)
    }
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        let currentText = textField.text ?? ""
        let newText = (currentText as NSString).replacingCharacters(in: range, with: string)
        
        filterAutoCompleteOptions(with: newText)
        
        return true
    }
    
    func filterAutoCompleteOptions(with text: String) {
        if text.isEmpty {
            autoCompleteTableView?.isHidden = true
        } else {
            let filteredOptions = autoCompleteData.filter { $0.lowercased().hasPrefix(text.lowercased()) }
            autoCompleteTableView?.isHidden = filteredOptions.isEmpty
        }
        
        autoCompleteTableView?.reloadData()
    }
}

extension ViewController: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return autoCompleteData.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell(style: .default, reuseIdentifier: nil)
        cell.textLabel?.text = autoCompleteData[indexPath.row]
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let selectedOption = autoCompleteData[indexPath.row]
        textField.text = selectedOption
        autoCompleteTableView?.isHidden = true
    }
}