单击和双击单元格不起作用

Question

我有一个简单的桌子，里面有几个单元格，里面有一个标签和一个圆圈。我想根据水龙头（单人或双人）更改标签。为此我需要知道单元格的indexPath，所以我添加了委托。点击被识别但是当我尝试将有关单元格的信息推送到ViewController时（函数tableViewCell（singleTapActionDelegatedFrom＆amp; doubleTapActionDelegatedFrom）似乎无法正常工作

ViewController.swift：

import UIKit

var elements: [[Int16]] = Array(repeating:Array(repeating:0, count:2), count:10)

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource
{
    func tableViewCell(singleTapActionDelegatedFrom cell: TableViewCell)
    {
        let indexPath = tableView.indexPath(for: cell)
        print("singleTap \(String(describing: indexPath)) ")
    }

    func tableViewCell(doubleTapActionDelegatedFrom cell: TableViewCell)
    {
        let indexPath = tableView.indexPath(for: cell)
        print("doubleTap \(String(describing: indexPath)) ")
    }

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

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

        if(elements[indexPath.row][1] == 1) //if red
        {
            cell.Label.text = String(elements[indexPath.row][0] * 3)
            cell.Circle.backgroundColor = UIColor.red
        }
        else //if blue
        {
            cell.Label.text = String(elements[indexPath.row][0])
            cell.Circle.backgroundColor = UIColor.blue
        }

        cell.delegate? = self as! TableViewCellDelegate

        return cell
    }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
    {
        return UIScreen.main.bounds.height/10
    }

    override func viewWillAppear(_ animated: Bool)
    {
        for i in 0..<elements.count
        {
            elements[i][0] = Int16(Int(arc4random_uniform(10)))
            elements[i][1] = Int16(Int(arc4random_uniform(2)))
        }

        Memory().save(entity: elements)
    }

    override func viewDidLoad()
    {
        super.viewDidLoad()
        tableView.dataSource = self
        tableView.tableFooterView = UIView()
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
    }

    @IBOutlet weak var tableView: UITableView!
}

TableViewCell.swift：

import UIKit

class TableViewCell: UITableViewCell
{
    var delegate: TableViewCellDelegate?
    private var tapCounter = 0

    override func awakeFromNib()
    {
        super.awakeFromNib()

        Circle.layer.cornerRadius = Circle.frame.width / 2

        let tap = UITapGestureRecognizer(target: self, action: #selector(tapAction))
        addGestureRecognizer(tap)
    }

    @objc func tapAction()
    {

        if tapCounter == 0
        {
            DispatchQueue.global(qos: .background).async
            {
                usleep(250000)
                if self.tapCounter > 1
                {
                    self.doubleTapAction()
                }
                else
                {
                    self.singleTapAction()
                }
                self.tapCounter = 0
            }
        }
        tapCounter += 1
    }

    func singleTapAction() {
        delegate?.tableViewCell(singleTapActionDelegatedFrom: self)
    }

    func doubleTapAction() {
        delegate?.tableViewCell(doubleTapActionDelegatedFrom: self)
    }

    @IBOutlet weak var Label: UILabel!
    @IBOutlet weak var Circle: UIView!
}

TableViewCellDelegate：

protocol TableViewCellDelegate
{
    func tableViewCell(singleTapActionDelegatedFrom cell: TableViewCell)
    func tableViewCell(doubleTapActionDelegatedFrom cell: TableViewCell)
}