ios - 如何在 UITableView 中将注释附加到不同的 UICells

Question

我有一个包含几行的 UITableView(每行代表一个问题)，当我按住一个单元格时，我想为每个单元格添加不同的注释。我有一个模型，我在其中硬编码了一些问题。问题是，当我添加评论时，该评论会添加到我的所有单元格中。我想将评论添加到相应的单元格，而不是所有单元格。我该怎么做？

我将在这里附上一个关于我的问题的小项目:AppendCommentsToCells

这是我的模型的代码:

import Foundation

class ChecklistItemSection {

    var name: String // name of the section
    var checklistItems: [ChecklistItem] // all items from Checklist

    init(named: String, includeChecklistItems: [ChecklistItem]) {

        name = named
        checklistItems = includeChecklistItems
    }

    class func checklistItemSections() -> [ChecklistItemSection] {

        return [vehicleCheck(), viewingScreen(), batteryUnitAndFridge()]
    }

    // Private methods
    private class func vehicleCheck() -> ChecklistItemSection {

        var checklistItems = [ChecklistItem]()

        checklistItems.append(ChecklistItem(templateID: 1, lineID: 1, descript: "Question 1")!)
        checklistItems.append(ChecklistItem(templateID: 2, lineID: 2, descript: "Question 2")!)
        checklistItems.append(ChecklistItem(templateID: 3, lineID: 3, descript: "Question 3")!)

        return ChecklistItemSection(named: "Section 1", includeChecklistItems: checklistItems)
    }

    private class func viewingScreen() -> ChecklistItemSection {

        var checklistItems = [ChecklistItem]()

        checklistItems.append(ChecklistItem(templateID: 4, lineID: 4, descript: "Question 4")!)
        checklistItems.append(ChecklistItem(templateID: 5, lineID: 5, descript: "Question 5")!)
        return ChecklistItemSection(named: "Section 2", includeChecklistItems: checklistItems)
    }

    private class func batteryUnitAndFridge() -> ChecklistItemSection {

        var checklistItems = [ChecklistItem]()

        checklistItems.append(ChecklistItem(templateID: 6, lineID: 6, descript: "Question 6")!)
        checklistItems.append(ChecklistItem(templateID: 7, lineID: 7, descript: "Question 7")!)
        checklistItems.append(ChecklistItem(templateID: 8, lineID: 8, descript: "Question 8")!)
        checklistItems.append(ChecklistItem(templateID: 9, lineID: 9, descript: "Question 9")!)
        return ChecklistItemSection(named: "Section 3", includeChecklistItems: checklistItems)
    }
}


class ChecklistItem {

    var template_id: Int
    var line_id: Int
    var descript: String

    var vehicleComment: String = String()
    var trailerComment: String = String()

    init?(templateID: Int,
          lineID: Int,
          descript: String // Question name
        ) {

        self.template_id = templateID
        self.line_id = lineID
        self.descript = descript
    }
}

这是我的 View Controller :

import UIKit

class ChecklistVC: UIViewController {

    @IBOutlet weak var questionsTableView: UITableView!

    //Properties
    var vehicleCommentReceived = String()
    var trailerCommentReceived = String()
    lazy var itemSections: [ChecklistItemSection] = {
        return ChecklistItemSection.checklistItemSections()
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

    }
}

extension ChecklistVC: UITableViewDelegate, UITableViewDataSource {

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

        let itemCategory = itemSections[section]
        return itemCategory.checklistItems.count
    }

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

        return itemSections.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: "checklistCell", for: indexPath) as! ChecklistCell

        let itemCategory = itemSections[indexPath.section]
        let item = itemCategory.checklistItems[indexPath.row]
        cell.delegate = self
        cell.configCell(item)

        cell.vehicleCommentLabel.text = "Vehicle comment: \(vehicleCommentReceived)"

        cell.trailerCommentLabel.text = "Trailer comment: \(trailerCommentReceived)"

        return cell
    }

    // Set the header of each section
    func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {

        let checklistItemCategory = itemSections[section]
        return checklistItemCategory.name.uppercased()
    }

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

        return 110
    }
}

extension ChecklistVC: ChecklistCellDelegate {

    func tapGestureOnCell() {

        showOptionsOnCellTapped()
    }

    func showOptionsOnCellTapped(){

        let addComment = UIAlertAction(title: "📝 Add Comment", style: .default) { action in
            self.performSegue(withIdentifier: "goChecklistAddComment", sender: nil)
        }

        let actionSheet = configureActionSheet()
        actionSheet.addAction(addComment)

        self.present(actionSheet, animated: true, completion: nil)
    }

    func configureActionSheet() -> UIAlertController {
        let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
        let cancel = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
        actionSheet.addAction(cancel)

        if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.pad ){
            actionSheet.popoverPresentationController?.sourceView = self.view
            actionSheet.popoverPresentationController?.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
            actionSheet.popoverPresentationController?.permittedArrowDirections = []
        }

        return actionSheet
    }
}

// Receive Comments using the Delegate
extension ChecklistVC: ChecklistAddCommentDelegate {

    func receiveVehicleComment(vehicleComment: String?, trailerComment: String?) {
        vehicleCommentReceived = vehicleComment ?? String()
        trailerCommentReceived = trailerComment ?? String()
        questionsTableView.reloadData()
    }

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

        if segue.identifier == "goChecklistAddComment" {
            let addCommentVC = segue.destination as! ChecklistAddCommentVC
            addCommentVC.delegate = self
        }
    }
}

这里我附上了我的问题的截图:

感谢您抽空阅读本文。

Answer 1

2 个变量 vehicleCommentReceived ,trailerCommentReceived 应该是每个模型对象中的属性

class ChecklistItem {

   var template_id: Int
   var line_id: Int
   var descript: String

   var vehicleComment = "" //<<<<< here
   var trailerComment = ""  // <<<<< here

}

当您编辑单元格时，请确保存储它的 indexPath，然后在保存时更改特定 indexPath 部分/行的模型数组

---

细胞内部

// Detect when the user press Long Tap on any cell
@objc func tapEdit(sender: UITapGestureRecognizer) {
    delegate?.tapGestureOnCell(self)
}

在vc里面声明

 var lastIndexPath:IndexPath!

然后这样实现

func tapGestureOnCell(_ cell:ChecklistCell) {

    showOptionsOnCellTapped(questionsTableView.indexPath(for: cell)!)
}

func showOptionsOnCellTapped(_ indexPath:IndexPath){

    let addComment = UIAlertAction(title: "📝 Add Comment", style: .default) { action in
        self.lastIndexPath = indexPath
        self.performSegue(withIdentifier: "goChecklistAddComment", sender: nil)
    }

    let actionSheet = configureActionSheet()
    actionSheet.addAction(addComment) 
    self.present(actionSheet, animated: true, completion: nil)
}

func receiveVehicleComment(vehicleComment: String?, trailerComment: String?) {
    let item = itemSections[lastIndexPath.section].checklistItems[lastIndexPath.row]
    item.vehicleComment = vehicleComment ?? ""
    item.trailerComment = trailerComment ?? ""
}

然后在 cellForRowAt

里面

cell.vehicleCommentLabel.text = "Vehicle comment: \(item.vehicleComment)" 
cell.trailerCommentLabel.text = "Trailer comment: \(item.trailerComment)"