使用UISearchController将获取的数据填充到tableView

let searchController = UISearchController(searchResultsController: nil)

searchController.searchBar.searchBarStyle = .minimal
searchController.searchBar.placeholder = "搜索"
searchController.searchBar.sizeToFit()

searchController.searchBar.delegate = self

extension ViewController: UISearchBarDelegate {
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        // 根据搜索关键字获取数据
        let results = fetchData(with: searchText)
        
        // 更新tableView的数据源
        self.dataArray = results
        
        // 刷新tableView
        self.tableView.reloadData()
    }
}

self.tableView.tableHeaderView = searchController.searchBar