使用popover选取器视图中选择的字符串数组自动刷新tableview

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITableViewDataSource {
    
    var tableView: UITableView!
    var picker: UIPickerView!
    var selectedStrings: [String] = []
    
    let data = ["Option 1", "Option 2", "Option 3", "Option 4", "Option 5"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建tableview
        tableView = UITableView(frame: view.bounds, style: .plain)
        tableView.dataSource = self
        view.addSubview(tableView)
        
        // 创建picker
        picker = UIPickerView()
        picker.delegate = self
        picker.dataSource = self
        
        // 创建popover
        let popover = UIPopoverController(contentViewController: picker)
        
        // 创建按钮
        let button = UIButton(type: .system)
        button.setTitle("Show Picker", for: .normal)
        button.addTarget(self, action: #selector(showPicker), for: .touchUpInside)
        button.frame = CGRect(x: 0, y: 0, width: 100, height: 50)
        view.addSubview(button)
        
        // 显示popover
        func showPicker() {
            popover.present(from: button.frame, in: view, permittedArrowDirections: .any, animated: true)
        }
    }
    
    // MARK: - UIPickerViewDelegate
    
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        // 获取选中的字符串数组
        selectedStrings = [data[row]]
        
        // 刷新tableview
        tableView.reloadData()
    }
    
    // MARK: - UIPickerViewDataSource
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return data.count
    }
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return data[row]
    }
    
    // MARK: - UITableViewDataSource
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return selectedStrings.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") ?? UITableViewCell(style: .default, reuseIdentifier: "Cell")
        cell.textLabel?.text = selectedStrings[indexPath.row]
        return cell
    }
}