在单击按钮时重置重新排序的TableView行

Question

我正在实现一个显示文档列表的表格视图：

MyTableviewController

import UIKit

class MyTableViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
    @IBOutlet weak var editButton: UIBarButtonItem!
    @IBOutlet weak var tableview: UITableView!

    var animalNameArray = ["cat","dog","lion"]

    override func viewDidLoad() {
        super.viewDidLoad()
        tableview.delegate = self
        tableview.dataSource = self
    }

    @IBAction func editButtonAtNavigationBar(_ sender: UIBarButtonItem) {
        self.tableview.isEditing = !self.tableview.isEditing
        sender.title = (self.tableview.isEditing) ?  "Done" : "Edit"
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

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

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let valueAtCell = tableView.dequeueReusableCell(withIdentifier: "myCustomCell", for: indexPath) as! CustomTableViewCell

        valueAtCell.cellLabel?.text = animalNameArray[indexPath.row]
        return valueAtCell
    }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 100
    }

    func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            animalNameArray.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
        } else if editingStyle == .insert {
            // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
        }
    }

    func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    //Rearranging the table view cells

    func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
        let itemMove = animalNameArray[sourceIndexPath.row]
        animalNameArray.remove(at: sourceIndexPath.row)
        animalNameArray.insert(itemMove, at: destinationIndexPath.row)
     }
 }

1. 我想单击“取消”按钮重置重新排序的列表。怎么样？

2. 当我关闭应用程序并重新启动时（任何时候运行刷新数据功能），当我需要保存重新排序的更改时，行将返回其默认位置。

我该如何在删除位置使用图像（垃圾箱）？

Answer 1

这是解决方案

import UIKit

class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {

    @IBOutlet weak var editButton: UIBarButtonItem!
    @IBOutlet weak var tableview: UITableView!

    var animalNameArray = ["cat","dog","lion"]

    override func viewDidLoad() {
        super.viewDidLoad()
        tableview.delegate = self
        tableview.dataSource = self

    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        let defaults = UserDefaults.standard
        let operationArray = defaults.stringArray(forKey: "SavedStringArray") ?? [String]()
        if operationArray.count == 0 {
        }else{
            animalNameArray = operationArray
        }

    }

    @IBAction func editButtonAtNavigationBar(_ sender: UIBarButtonItem) {
        self.tableview.isEditing = !self.tableview.isEditing
        sender.title = (self.tableview.isEditing) ?  "Done" : "Edit"
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

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

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let valueAtCell = tableView.dequeueReusableCell(withIdentifier: "myCustomCell", for: indexPath) as! CustomTableViewCell

        valueAtCell.cellLabel?.text = animalNameArray[indexPath.row]
        return valueAtCell
    }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 100
    }

    func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            animalNameArray.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
            print(animalNameArray)

            let defaults = UserDefaults.standard
            defaults.set(animalNameArray, forKey: "SavedStringArray")

        } else if editingStyle == .insert {
            // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
        }
    }

    func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    //Rearranging the table view cells

    func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
        let itemMove = animalNameArray[sourceIndexPath.row]
        animalNameArray.remove(at: sourceIndexPath.row)
        animalNameArray.insert(itemMove, at: destinationIndexPath.row)

        print(animalNameArray)
    }


}

欢迎大家：）

下载示例

https://github.com/testingraahul/TableViewEditing/tree/master

Answer 2

nvm

尝试使用此代码，然后将情节提要中的“取消”按钮连接到import UIKit class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource { @IBOutlet weak var editButton: UIBarButtonItem! @IBOutlet weak var tableview: UITableView! var animalNameArray = [String]() { didSet { UserDefaults.standard.set(animalNameArray, forKey: "savedNameArray") } } var originalArray = [String]() override func viewDidLoad() { super.viewDidLoad() tableview.delegate = self tableview.dataSource = self animalNameArray = UserDefaults.standard.array(forKey: "savedNameArray") as? [String] ?? ["cat","dog","lion"] originalArray = animalNameArray } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) } @IBAction func editButtonAtNavigationBar(_ sender: UIBarButtonItem) { self.tableview.isEditing = !self.tableview.isEditing sender.title = (self.tableview.isEditing) ? "Done" : "Edit" } @IBAction func cancelButtonAtNavigationBar(_ sender: UIBarButtonItem) { self.tableview.isEditing = false navigationItem.rightBarButtonItem?.title = "Edit" animalNameArray = originalArray tableview.reloadData() } func numberOfSections(in tableView: UITableView) -> Int { return 1 } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return animalNameArray.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let valueAtCell = tableView.dequeueReusableCell(withIdentifier: "myCustomCell", for: indexPath) as! CustomTableViewCell valueAtCell.cellLabel?.text = animalNameArray[indexPath.row] return valueAtCell } func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { return 100 } func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) { if editingStyle == .delete { animalNameArray.remove(at: indexPath.row) tableView.deleteRows(at: [indexPath], with: .fade) } else if editingStyle == .insert { // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view. } } func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool { return true } //Rearranging the table view cells func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) { let itemMove = animalNameArray[sourceIndexPath.row] animalNameArray.remove(at: sourceIndexPath.row) animalNameArray.insert(itemMove, at: destinationIndexPath.row) } }