你的问题很广泛，所以首先要做的事情。您可能应该首先从数据的模型定义开始。

// This is a model for our table
struct University {
    let name: String
    let address: String

    static let allUniversities = [
        University(name: "The University of Texas at Austin", address: "110 Inner Campus Drive Austin, TX 78705"),
        University(name: "Rice University", address: "6100 Main St., Houston, TX 77005-1892"),
        University(name: "Texas A&M University", address: "Administration Building, 400 Bizzell St, College Station, TX 77843")
        // Add more universities here
    ]
}

这将清楚地将模型与控制器逻辑分离。
自定义表的最佳方法是不使用UITablewViewController，而是在UIViewController中使用UITableView和UISearchBar。如果使用故事板，它看起来像这样：

将搜索栏添加到UITableView的顶部位置非常重要。下面是视图控制器的样子。

class ViewController: UIViewController {

    // Make sure you connect those IBOutlets to your Storyboard
    @IBOutlet var tableView: UITableView!
    @IBOutlet var searchBar: UISearchBar!

    // This is our main data source
    let data: [University] = University.allUniversities

    // This is where we save filtered results from search and display it
    var searchedResults: [University] = []

    // This is a flag that determines if to show all the results or only the searched results
    var isSearching = false {
        didSet {
            tableView.reloadData() // Reload the data if the flag changes
        }
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        tableView.dataSource = self
        searchBar.delegate = self
    }

    // MARK: - Helper methods

    /// Retuns active dataset based on the search state
    func activeDataset() -> [University] {
        if isSearching {
            return searchedResults
        } else {
            return data
        }
    }

    /// Returns a list of univerties matching given query
    func filteredUniversities(query: String) -> [University] {
        return data.filter { $0.name.contains(query) }
    }
}

正如您在viewDidLoad方法中看到的，我们添加了ViewController作为表的dataSource和搜索栏的delegate，因此我们需要确保符合这些协议

extension ViewController: UITableViewDataSource {

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
        let universities = activeDataset()
        let university = universities[indexPath.row] // Get data for the row

        cell.textLabel!.text = university.name // Update the cell with the data

        return cell
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1 // Our data are all in 1 section
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return activeDataset().count
    }
}

在这里，我们创建了一个逻辑来显示搜索结果或所有数据，这取决于搜索是否处于活动状态。

extension ViewController: UISearchBarDelegate {
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        // Check if the searched text has at least 1 character otherwise show all results
        guard searchText != "" else {
            isSearching = false
            searchedResults.removeAll()
            return
        }

        searchedResults = filteredUniversities(query: searchText)
        isSearching = true
    }
}

我们使用UISearchBarDelegate来确定用户何时在搜索栏中键入内容。
完整代码here