无法使带有标识符Cell的单元出队-必须为该标识符注册一个笔尖或一个类或在情节提要中连接原型单元 [英] unable to dequeue a cell with identifier Cell - must register a nib or a class for the identifier or connect a prototype cell in a storyboard

问题描述

对于一般的编码我还是很陌生，对Xcode(Swift)真的很陌生.我了解我需要注册一个笔尖或一个类，但我不理解在哪里或如何?".

I am fairly new to coding in general and really new to Xcode (Swift). I understand that I need to register a nib or a class but I don't understand 'where or how?'.

import UIKit

class NotesListViewController: UITableViewController {

    @IBOutlet weak var menuButton: UIBarButtonItem!

  override func viewDidLoad() {
    super.viewDidLoad()
    NSNotificationCenter.defaultCenter().addObserver(self,
      selector: "preferredContentSizeChanged:",
      name: UIContentSizeCategoryDidChangeNotification,
      object: nil)

    // Side Menu

    if self.revealViewController() != nil {
        menuButton.target = self.revealViewController()
        menuButton.action = "revealToggle:"
        self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
    }

  }

  override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)
    // whenever this view controller appears, reload the table. This allows it to reflect any changes
    // made whilst editing notes
    tableView.reloadData()
  }

  func preferredContentSizeChanged(notification: NSNotification) {
    tableView.reloadData()
  }

  // #pragma mark - Table view data source

  override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
  }

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

  override func tableView(tableView: UITableView, cellForRowAtIndexPath   indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell

    let note = notes[indexPath.row]
    let font = UIFont.preferredFontForTextStyle(UIFontTextStyleHeadline)
    let textColor = UIColor(red: 0.175, green: 0.458, blue: 0.831, alpha: 1)
    let attributes = [
      NSForegroundColorAttributeName : textColor,
      NSFontAttributeName : font,
      NSTextEffectAttributeName : NSTextEffectLetterpressStyle
    ]
    let attributedString = NSAttributedString(string: note.title, attributes: attributes)

    cell.textLabel?.font = UIFont.preferredFontForTextStyle(UIFontTextStyleHeadline)

    cell.textLabel?.attributedText = attributedString

    return cell
  }

  let label: UILabel = {
    let temporaryLabel = UILabel(frame: CGRect(x: 0, y: 0, width: Int.max, height: Int.max))
    temporaryLabel.text = "test"
    return temporaryLabel
    }()

  override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    label.font = UIFont.preferredFontForTextStyle(UIFontTextStyleHeadline)
    label.sizeToFit()
    return label.frame.height * 1.7
  }

  override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    if editingStyle == .Delete {
      notes.removeAtIndex(indexPath.row)
      tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
    }
  }

  // #pragma mark - Navigation

  // In a storyboard-based application, you will often want to do a little preparation before navigation
  override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
    if let editorVC = segue.destinationViewController as? NoteEditorViewController {

      if "CellSelected" == segue.identifier {
        if let path = tableView.indexPathForSelectedRow() {
          editorVC.note = notes[path.row]
        }
      } else if "AddNewNote" == segue.identifier {
        let note = Note(text: " ")
        editorVC.note = note
        notes.append(note)
      }
    }
  }

}

推荐答案

您是否已在情节提要中将 Table Cell 标识符设置为"Cell"?

Have you set the Table Cell identifier to "Cell" in your storyboard?

还是您将UITableViewController的班级设置为该场景中的班级?

Or have you set the class for the UITableViewController to your class in that scene?

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