如何使用swift在表视图中搜索多个数据？

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate {
    
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var searchBar: UISearchBar!
    
    var dataArray = ["Apple", "Banana", "Orange", "Mango", "Grapes"]
    var searchResultsArray = [String]()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        tableView.dataSource = self
        tableView.delegate = self
        searchBar.delegate = self
    }
    
    // MARK: - UITableViewDataSource
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if searchBar.text != "" {
            return searchResultsArray.count
        } else {
            return dataArray.count
        }
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
        
        if searchBar.text != "" {
            cell.textLabel?.text = searchResultsArray[indexPath.row]
        } else {
            cell.textLabel?.text = dataArray[indexPath.row]
        }
        
        return cell
    }
    
    // MARK: - UISearchBarDelegate
    
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        searchResultsArray = dataArray.filter({ $0.lowercased().contains(searchText.lowercased()) })
        tableView.reloadData()
    }
}