Question

import UIKit

let country = ["Argentina", "Australia", "Belgium", "Brazil", "Colombia", "Costa Rica", "Croatia", "Denmark", "Egypt", "England", "France", "Germany", "Iceland", "Iran", "Japan", "Mexico", "Morocco", "Nigeria", "Panama", "Peru", "Poland", "Portugal", "Republic of Korea", "Russia", "Saudi Arabia", "Senegal", "Serbia", "Spain", "Sweden", "Switzerland", "Tunis", "Uruguay"]

let country2 = ["Argentina2", "Australia2", "Belgium2", "Brazil2", "Colombia2", "Costa Rica2", "Croatia2", "Denmark2", "Egypt2", "England2", "France2", "Germany2", "Iceland2", "Iran2", "Japan2", "Mexico2", "Morocco2", "Nigeria2", "Panama2", "Peru2", "Poland2", "Portugal2", "Republic of Korea2", "Russia2", "Saudi Arabia2", "Senegal2", "Serbia2", "Spain2", "Sweden2", "Switzerland2", "Tunis2", "Uruguay2"]

let country3 = ["Argentina3", "Australia3", "Belgium3", "Brazil3", "Colombia3", "Costa Rica3", "Croatia3", "Denmark3", "Egypt3", "England3", "France3", "Germany3", "Iceland3", "Iran3", "Japan3", "Mexico3", "Morocco3", "Nigeria3", "Panama3", "Peru3", "Poland3", "Portugal3", "Republic of Korea3", "Russia3", "Saudi Arabia3", "Senegal3", "Serbia3", "Spain3", "Sweden3", "Switzerland3", "Tunis3", "Uruguay3"]

var myIndex = 0

class TableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate {

    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

        filteredArray = country.filter({$0.lowercased().contains(searchText.lowercased())})
        if searchText == "" {
            filteredArray = country
        }
        self.tableView.reloadData()
    }

    var filteredArray = [String]()
    var searchController = UISearchController()
    var searchBar = UISearchBar()
    var resultController = UITableViewController()
    let country = ["Argentina", "Australia", "Belgium", "Brazil", "Colombia", "Costa Rica", "Croatia", "Denmark", "Egypt", "England", "France", "Germany", "Iceland", "Iran", "Japan", "Mexico", "Morocco", "Nigeria", "Panama", "Peru", "Poland", "Portugal", "Republic of Korea", "Russia", "Saudi Arabia", "Senegal", "Serbia", "Spain", "Sweden", "Switzerland", "Tunis", "Uruguay"]


    @IBOutlet weak var tableView: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.dataSource = self
        tableView.delegate = self
        filteredArray = country
        searchBar.frame = CGRect(x: 0, y: 0, width: 400, height: 50)
        self.tableView.tableHeaderView = searchBar
        self.searchBar.delegate = self
        definesPresentationContext = true
    }

    // MARK: - Table view data source

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

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

        cell.accessoryType = .disclosureIndicator
        cell.textLabel?.font = UIFont.systemFont(ofSize: 18.0)
        cell.textLabel?.text = self.filteredArray[indexPath.row]
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        performSegue(withIdentifier: "seque", sender: self)
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        if segue.identifier == "seque" {
            if let indexPath = self.tableView.indexPathForSelectedRow {
                let viewController: ViewController = segue.destination as! ViewController
                viewController.myIndex = indexPath
            }
        }
    }
}

Answer 1

您的代码存在一些问题：

在cellForRow中，您正在将表视图出列，而不是由委托方法给出的tableView。 self.tableView.dequeueReusableCell(withIdentifier:此处不使用self。
您正在使用没有任何原型单元格的resultController来显示数据。在这里你的应用程序将崩溃
我不明白你在prepareForSegue
不要使用任何全局变量。如果您想使用myIndex，请在destinationVC中创建一个属性并将其传递给prepareForSegue。
您正在表视图上显示filteredArray，并从country数组中选择获取值，这就是您获取错误值的原因。

我发现，您不需要SearchViewController，因为您使用单个View控制器来显示过滤后的数据。

class TableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate {

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

    filteredArray = country.filter({$0.lowercased().contains(searchText.lowercased())})
    if searchText == "" {
        filteredArray = country
    }
    self.tableView.reloadData()
}

var filteredArray = [String]()
var searchController = UISearchController()
var searchBar = UISearchBar()
var resultController = UITableViewController()
let country = ["Argentina", "Australia", "Belgium", "Brazil", "Colombia", "Costa Rica", "Croatia", "Denmark", "Egypt", "England", "France", "Germany", "Iceland", "Iran", "Japan", "Mexico", "Morocco", "Nigeria", "Panama", "Peru", "Poland", "Portugal", "Republic of Korea", "Russia", "Saudi Arabia", "Senegal", "Serbia", "Spain", "Sweden", "Switzerland", "Tunis", "Uruguay"]


@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.dataSource = self
    tableView.delegate = self
    filteredArray = country
    searchBar.frame = CGRect(x: 0, y: 0, width: 400, height: 50)
    self.tableView.tableHeaderView = searchBar
    self.searchBar.delegate = self
    definesPresentationContext = true
}

// MARK: - Table view data source

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

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

    cell.accessoryType = .disclosureIndicator
    cell.textLabel?.font = UIFont.systemFont(ofSize: 18.0)
    cell.textLabel?.text = self.filteredArray[indexPath.row]
    return cell
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    performSegue(withIdentifier: "seque", sender: self)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    if segue.identifier == "seque" {
        if let indexPath = self.tableView.indexPathForSelectedRow {
            let viewController: ViewController = segue.destination as! ViewController
            let newIndex: Int = country.index(of: filteredArray[indexPath.row])!

            viewController.myIndex = newIndex

        }
    }
}
}

如果有效，请告诉我。

修改

您的班级ViewController应如下所示：

class ViewController: UIViewController { @IBOutlet weak var myImageView: UIImageView! @IBOutlet weak var myImageView2: UIImageView! @IBOutlet weak var myImageView3: UIImageView! var myIndex: Int! override func viewDidLoad() { super.viewDidLoad() myImageView.image = UIImage(named: country[myIndex]) myImageView2.image = UIImage(named:country2[myIndex]) myImageView3.image = UIImage(named: country3[myIndex]) } // Other methods }

过滤后（搜索表），不工作项目选择（Swift）

1 个答案: