Question

我有两个表视图控制器，第二个表视图控制器包含具有不同选项的条目，以添加到第一个视图表视图控制器。表格视图控制器的第一行有两个滑动动作，即完成和删除。

每行/单元格有两个标签，一个带有从第二个表格视图控制器中选择的选项的标题，第二个标签是其创建的日期。

点击完成的滑动动作后，删除线功能将同时删除两个标签的文本。

但是，我注意到每次滑动条目并将其删除，然后再次添加相同条目时，它都会自动滑动单元格的标题标签。

如果我返回并重新启动第一个视图控制器，它将清除警告。

这种罢工是随机发生的，即有时罢工，有时不罢工，甚至不调用穿越功能。

任何建议都将不胜感激。

查看控制器1：

import UIKit

class nTableViewController: UITableViewController {

    @IBOutlet weak var progressBar: UIProgressView!


    var nItems:[TodoItem]! {

        didSet {
                progressBar.setProgress(progress, animated: true)
        }



    }
    var progress:Float{
        if nItems.count > 0 {
            return Float(nItems.filter({$0.completed}).count) / Float(nItems.count)
        }else {
            return 0
            }
        }




    var selectedTitle = String() {
        didSet {
            creatensItem(with: selectedTitle, modalDismiss: true)
    }
    }

    @IBAction func unwindtonsTBVC(segue:UIStoryboardSegue) { }



    //
    func  creatensItem(with titleRcvd:String, modalDismiss:Bool) {

            let newnItem = TodoItem.init(title: titleRcvd, completed: false, createdAt: Date(), itemIdentifier: UUID())
            newnItem.saveItem()
            if nItems == nil  {
            self.tableView.beginUpdates()
            self.nItems.append(newnItem)
            let indexPath = IndexPath(row: self.tableView.numberOfRows(inSection: 0), section:0)
            self.tableView.insertRows(at: [indexPath], with: .automatic)
            progressBar.setProgress(progress, animated: true)
            self.tableView.endUpdates()
        } else {
            print(LocalizedError.self)
        }


    }

    func completenItem(_ indexPath:IndexPath) {
        var nItem = nItems[indexPath.row]
        nItem.markAsCompleted()
        nItems[indexPath.row] = nItem


        let createdDate = nItem.createdAt
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM d, yyyy hh:mm a"
        formatter.dateStyle = .medium
        formatter.timeStyle = .medium
        let finalDate = formatter.string(from: createdDate)




        if let cell = tableView.cellForRow(at: indexPath) as? nTableViewCell{
              cell.nPurposeLabel.attributedText  = strikeThroughText(nItem.title)
              cell.nsDateOutlet.attributedText  = strikeThroughText(finalDate)
            UIView.animate(withDuration: 0.1, animations: {
                cell.transform = cell.transform.scaledBy(x: 1.5, y: 1.5)
            }) { (success) in
                UIView.animate(withDuration: 0.3, delay: 0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.5, options: .curveEaseOut, animations: {
                    cell.transform = CGAffineTransform.identity
                }, completion: nil)
            }
        }
//        if let indexPath = tableView.indexPath(for: cell){
//        var nItem = nItems[indexPath.row]
//        nItem.markAsCompleted()
//        cell.nPurposeLabel.attributedText  = strikeThroughText(nItem.title)
    }



    func strikeThroughText (_ text:String) -> NSAttributedString{
        let strokeEffect: [NSAttributedString.Key : Any] =
            [
                NSAttributedString.Key.strikethroughStyle: NSUnderlineStyle.single.rawValue,
                NSAttributedString.Key.strikethroughColor: (UIColor(red: 0.0, green: 1.0, blue: 1.0, alpha: 1.0))
                ]

        let attributeString = NSAttributedString(string: text, attributes: strokeEffect)
        return attributeString
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        loadData()
        tableView.reloadData()
        progressBar.setProgress(progress, animated: true)
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(true)
        tableView.reloadData()
        loadData()
    }
    func loadData() {
        nItems = [TodoItem]()
        nItems = nDataManager.loadAll(TodoItem.self).sorted(by: {
            $0.createdAt < $1.createdAt
        })
        tableView.reloadData()
//        progressBar.setProgress(progress, animated: true)
    }
    // MARK: - Table view data source



    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1   }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {



        return nItems.count
    }


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "nCell", for: indexPath) as! nTableViewCell



        let item = nItems[indexPath.row]


        let createdDate = item.createdAt
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM d, yyyy hh:mm a"
        formatter.dateStyle = .medium
        formatter.timeStyle = .medium

        let finalDate = formatter.string(from: createdDate)

         cell.nPurposeLabel.text = item.title
         cell.nsDateOutlet.text = finalDate
        if item.completed {

            cell.nPurposeLabel.attributedText = strikeThroughText(item.title)
            cell.nsDateOutlet.attributedText = strikeThroughText(finalDate)
        }
        return cell
    }




    override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
        let deleteAction = UITableViewRowAction(style: .normal, title: "Delete") { (action: UITableViewRowAction, indexPath:IndexPath) in
            self.nItems[indexPath.row].deleteItem()
            self.nItems.remove(at: indexPath.row)
            self.tableView.deleteRows(at: [indexPath], with: .automatic)
        }
            let completeAction = UITableViewRowAction(style: .normal, title: "Complete") { (action: UITableViewRowAction, indexPath:IndexPath) in
                self.completenItem(indexPath)
            }

        if #available(iOS 11.0, *) {
            deleteAction.backgroundColor = #colorLiteral(red: 1, green: 0, blue: 0.150029252, alpha: 1)
            completeAction.backgroundColor = #colorLiteral(red: 0.1676996052, green: 0.1956448257, blue: 0.2248058021, alpha: 1)
        } else {

            deleteAction.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 1.0)
        }
        return [deleteAction ,completeAction]
    }

View Controller 2：

  override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let nsVC = segue.destination as! nTableViewController
        nsVC.selectedTitle = selectednsTitle
    }

    func action (with selectednsTitle:String){

        performSegue(withIdentifier: "unwindtonsTBVCWithSegue", sender: self)

}

在表格视图中自动敲击标签文本

0 个答案: