一个 tableView 显示、编辑、删除的 demo

FontViewController.swift

//
//  FontViewController.swift
//  SF
//
//  Created by muhlenXi on 2018/12/2.
//  Copyright © 2018 muhlenXi. All rights reserved.
//

import UIKit

fileprivate let CellIdentifier = "CellIdentifier"

class FontViewController: UIViewController {

    var dataSourece = UIFont.familyNames
    
    lazy var tableView: UITableView = {
        let table = UITableView()
        table.backgroundColor = UIColor.white
        table.tableFooterView = UIView()
        table.estimatedRowHeight = 0
        table.estimatedSectionHeaderHeight = 0
        table.estimatedSectionFooterHeight = 0
        table.dataSource = self
        table.delegate = self
        return table
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupSubviews()
    }
    

    // MARK: Private method
    func setupSubviews() {
        self.edgesForExtendedLayout = .bottom
        self.navigationItem.title = "UIFont family"
        self.view.backgroundColor = UIColor.white
        
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: CellIdentifier)
        self.view.addSubview(tableView)
        
        tableView.snp.makeConstraints { (maker) in
            maker.edges.equalTo(self.view)
        }
    }
    
    /// 编辑输入框
    func showInputAlert(indexPath: IndexPath) {
        
        let alertController = UIAlertController(title: "编辑", message: nil, preferredStyle: .alert)
        alertController.addTextField { (tf) in
            tf.text = self.dataSourece[indexPath.row]
        }
        let cancelAction = UIAlertAction(title: "取消", style: .cancel) { (action) in
            self.tableView.setEditing(false, animated: true)
        }
        let confirmAction = UIAlertAction(title: "确定", style: .default) { (action) in
            if let text = alertController.textFields?.first?.text {
                self.dataSourece[indexPath.row] = text
                self.tableView.reloadRows(at: [indexPath], with: .automatic)
            }
        }
        alertController.addAction(cancelAction)
        alertController.addAction(confirmAction)
        
        self.present(alertController, animated: true, completion: nil)
    }
}

// MARK: UITableViewDataSource
extension FontViewController: UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return dataSourece.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: CellIdentifier, for: indexPath)
        cell.textLabel?.text = dataSourece[indexPath.row]
        return cell
    }
}

// MARK: UITableViewDelegate
extension FontViewController: UITableViewDelegate {
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
        print("did select section: \(indexPath.section) row: \(indexPath.row)")
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 45.0
    }
    
    func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
        let editAction = UITableViewRowAction(style: .normal, title: "编辑") { (action, indexpath) in
            self.showInputAlert(indexPath: indexPath)
        }
        editAction.backgroundColor = UIColor.blue
        let deleteAction = UITableViewRowAction(style: .destructive, title: "删除") { (action, indexpath) in
            
            /// 先删除数据源，再删除 cell
            self.dataSourece.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .automatic)
        }
        return [deleteAction, editAction]
    }
}