iOS UITableView 上的 didSelectRowAt 行不工作

Question

我正在尝试跟进有关 CodePath 的本教程：访问 https://guides.codepath.com/ios/Search-Bar-Guide#cancelling-out-of-search-and-hiding-keyboard

我创建了一个 SearchViewController 来进行搜索，但是 didSelectRowAt 不起作用

下面是我的代码：

class SearchViewController: UIViewController, UITableViewDataSource, UISearchBarDelegate {
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var searchBar: UISearchBar!

    let data = ["New York, NY", "Los Angeles, CA", "Chicago, IL", "Houston, TX",
                "Philadelphia, PA", "Phoenix, AZ", "San Diego, CA", "San Antonio, TX",
                "Dallas, TX", "Detroit, MI", "San Jose, CA", "Indianapolis, IN",
                "Jacksonville, FL", "San Francisco, CA", "Columbus, OH", "Austin, TX",
                "Memphis, TN", "Baltimore, MD", "Charlotte, ND", "Fort Worth, TX"]

    var filteredData: [String]!

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.dataSource = self
        tableView.allowsSelection = true
        searchBar.delegate = self
        filteredData = data
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "TableCell", for: indexPath) as UITableViewCell
        cell.textLabel?.text = filteredData[indexPath.row]
        return cell
    }

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


    // THIS IS NOT WORKING
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        print("didSelectRowAt(\(indexPath)")
    }

    // This method updates filteredData based on the text in the Search Box
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        // When there is no text, filteredData is the same as the original data
        // When user has entered text into the search box
        // Use the filter method to iterate over all items in the data array
        // For each item, return true if the item should be included and false if the
        // item should NOT be included
        filteredData = searchText.isEmpty ? data : data!.filter { (item: String) -> Bool in
            // If dataItem matches the searchText, return true to include it
            return item.range(of: searchText, options: .caseInsensitive, range: nil, locale: nil) != nil
        }

        tableView.reloadData()
    }

    func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
        self.searchBar.showsCancelButton = true
    }

    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        searchBar.showsCancelButton = false
        searchBar.text = ""
        searchBar.resignFirstResponder()
    }
}

我还需要做些什么吗？本教程没有显示我遗漏的任何其他代码。

Answer 1

您应该在 viewDidLoad 函数中将 UITableViewDelegate 委托给 class 和 tableView.delegate = self。这将有助于触发 UITableViewController.

的委托函数

Answer 2

在您的 viewDidLoad() 方法中

 tableView.delegate = self
 tableView.dataSource = self

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