向 UIAlertController 添加复选标记框

Question

我希望我的代码添加一个能够添加复选标记框的 UIAlertController。理想情况下，我正在寻找的是如何在警报上添加是和否复选标记框并将其显示在表格视图单元格上。我添加了一张我专门寻找的照片。现在我的代码只是在左侧显示图像并将名称添加到表格视图单元格中。

import UIKit
import CoreData

var singers = [Singer]()

class SingerVC: UIViewController {
    let tableView = UITableView()
    let navigationBar = UINavigationBar()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        singers = DataManager.shared.singers()
    }
    
    func setupUI() {
        title = "Singers"
        
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "singerCell")
        tableView.dataSource = self
        tableView.delegate = self
        tableView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(tableView)
        
        NSLayoutConstraint.activate([
            tableView.topAnchor.constraint(equalTo: view.topAnchor),
            tableView.leftAnchor.constraint(equalTo: view.leftAnchor),
            tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            tableView.rightAnchor.constraint(equalTo: view.rightAnchor)
        ])
        
        navigationBar.translatesAutoresizingMaskIntoConstraints = false
        tableView.addSubview(navigationBar)
        navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addSinger))
    }
    
    @objc func addSinger(_ sender: UIBarButtonItem) {
        var textfield = UITextField()
        
        let alert = UIAlertController(title: "Enter new singer", message: "", preferredStyle: .alert)
        let createAction = UIAlertAction(title: "Create", style: .default) { (action) in
            let singer = DataManager.shared.singer(name: textfield.text ?? "")
            singers.append(singer)
            DataManager.shared.save()
            self.tableView.reloadData()
        }
        
        alert.addTextField { (alertTextField) in
            alertTextField.placeholder = "Ex: Beyonce"
            textfield = alertTextField
        }
        
        let cancelAction = UIAlertAction(title: "Cancel", style: .destructive) { (action) in
            self.dismiss(animated: true, completion: nil)
        }
        
        alert.addAction(createAction)
        alert.addAction(cancelAction)
        present(alert, animated: true, completion: nil)
    }
}

// MARK: - UITableView extensions
extension SingerVC: UITableViewDelegate, UITableViewDataSource {
    
    func numberOfSections(in tableView: UITableView) -> Int {
        1
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return singers.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let singer = singers[indexPath.row]
        let cell = tableView.dequeueReusableCell(withIdentifier: "singerCell", for: indexPath) as UITableViewCell
        cell.textLabel?.text = singer.name
        cell.accessoryType = .disclosureIndicator
        tableView.deselectRow(at: indexPath, animated: true)
        return cell
    }
    
 
    
    private func editSingerAction(indexPath: IndexPath) {
        let singer = singers[indexPath.row]
        var nameTextField = UITextField()

        let alert = UIAlertController(title: "Edit singer", message: "", preferredStyle: .alert)
        let editAction = UIAlertAction(title: "Edit", style: .default) { (action) in
            singer.setValue(nameTextField.text ?? "", forKey: "name")
            DataManager.shared.save()
            self.tableView.reloadData()
        }
        
        alert.addTextField { (alertTextField) in
            alertTextField.placeholder = "Ex: Beyonce"
            alertTextField.text = singer.name
            nameTextField = alertTextField
        }

        let cancelAction = UIAlertAction(title: "Cancel", style: .destructive) { (action) in
            self.dismiss(animated: true, completion: nil)
        }
        
        alert.addAction(editAction)
        alert.addAction(cancelAction)
        present(alert, animated: true, completion: nil)
    }
    
    private func deleteSingerAction(indexPath: IndexPath) {
        let singer = singers[indexPath.row]
        let areYouSureAlert = UIAlertController(title: "Are you sure you want to delete this singer?", message: "", preferredStyle: .alert)
        let yesDeleteAction = UIAlertAction(title: "Yes", style: .destructive) { [self] (action) in
            DataManager.shared.deleteSinger(singer: singer)
            singers.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
            tableView.reloadData()
        }
        let noDeleteAction = UIAlertAction(title: "No", style: .default) { (action) in
            //do nothing
        }
        areYouSureAlert.addAction(noDeleteAction)
        areYouSureAlert.addAction(yesDeleteAction)
        self.present(areYouSureAlert, animated: true, completion: nil)
    }
}

Answer 1

针对此类需求创建自己的自定义