如何在 UISearchController 中使用自定义视图控制器获取结果？

Question

我目前正在尝试为应用实现搜索功能。目标是在不同的视图控制器中显示搜索结果。我的意思是这样的：

UISearchController(searchResultsController: myCustomViewControllerHere)

我在教程中找到的所有答案都使用带有数据的当前视图控制器作为显示结果的视图控制器：

UISearchController(searchResultsController: nil)

有人可以帮忙解决这个问题吗？我正在链接一个教程，它在同一个 VC 上显示结果

Tutorial Link

Answer 1

您需要创建一个 SearchController 并将其设置为在另一个 TableViewController 中显示结果：

视图控制器

import UIKit

class ViewController: UIViewController, UISearchControllerDelegate {

    var controladorDeBusca: UISearchController!

    var resultsTableViewController: ResultsTableViewController?

    override func viewDidLoad() {
        super.viewDidLoad()

        resultsTableViewController = storyboard!.instantiateViewController(withIdentifier: "resultsTableViewController") as? ResultsTableViewController

        configurarControladorDeBusca()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func configurarControladorDeBusca() {

        controladorDeBusca = UISearchController(searchResultsController: resultsTableViewController)
        controladorDeBusca.delegate = self
        controladorDeBusca.searchResultsUpdater = resultsTableViewController
        controladorDeBusca.dimsBackgroundDuringPresentation = true
        definesPresentationContext = true

        controladorDeBusca.loadViewIfNeeded()

        //Configura a barra do Controlador de busca
        controladorDeBusca.searchBar.delegate = resultsTableViewController
        controladorDeBusca.hidesNavigationBarDuringPresentation = false
        controladorDeBusca.searchBar.placeholder = "Search place"
        controladorDeBusca.searchBar.sizeToFit()
        controladorDeBusca.searchBar.barTintColor = navigationController?.navigationBar.barTintColor
        controladorDeBusca.searchBar.tintColor = self.view.tintColor

        //Adiciona a barra do Controlador de Busca a barra do navegador
        navigationItem.titleView = controladorDeBusca.searchBar
    }
}

ResultsTableViewController

import UIKit

class ResultsTableViewController: UITableViewController, UISearchResultsUpdating, UISearchBarDelegate {

    var array = ["Brazil", "Bolivia", "United States", "Canada", "England", "Germany", "France", "Portugal"]

    var arrayFilter = [String]()

    override func viewDidLoad() {
        super.viewDidLoad()


    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()

    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return arrayFilter.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "searchCell", for: indexPath)

        cell.textLabel?.text = arrayFilter[indexPath.row]

        return cell
    }


    func updateSearchResults(for searchController: UISearchController) {


    }

    func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {

        arrayFilter.removeAll()

        if let text = searchBar.text {
            for string in array {
                if string.contains(text) {
                    arrayFilter.append(string)
                }
            }
        }

        tableView.reloadData()
    }

    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {

        arrayFilter.removeAll()
        tableView.reloadData()
    }

    func searchBarShouldBeginEditing(_ searchBar: UISearchBar) -> Bool {

        arrayFilter.removeAll()
        tableView.reloadData()

        return true
    }
}

希望对你有帮助。