UITableViewCell 复选标记在点击时打开和关闭

我正在处理表格视图

我希望能够点击每个单元格，点击时，它会在单元格上显示一个复选标记

现在我有一些代码可以实现此功能：

// checkmarks when tapped

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let section = indexPath.section
    let numberOfRows = tableView.numberOfRowsInSection(section)
    for row in 0..<numberOfRows {
        if let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: row, inSection: section)) {
            cell.accessoryType = row == indexPath.row ? .Checkmark : .None
        }
    }
}

但此代码仅选择一个部分内的 1 个单元格（我有 5 个部分）

我需要它来选择任何地方的任何单元格

另外，当我上下拖动屏幕时，我会被复选标记丢失

视图控制器.swift

class ViewController: UIViewController, UITableViewDataSource {                        //class and subclass                  |)
//---------------------------------------------------------------------------------------------------------------------------/
    // Variable and constant, also IBAOutlet

    let section1 =
       ["this is used",
        "this is used to test",
        "this is used to test the lenght",
        "this is used to test the lenght of the text",
        "this is used to test the lenght of the text",
        "this is used to test the lenght of the text",
        "this is used to test the lenght of the text",
        "this is used to test the lenght of the text",
        "this is used to test the lenght of the text",]
    let section2 =
       ["this is used to test the lenght of the text"]
    let section3 =
       ["this is",
        "this is ",]


    @IBOutlet weak var scoreshow: UILabel!
    @IBOutlet weak var reset: UIButton!
    @IBOutlet weak var tableView: UITableView!

// --------------------------------------------------------------------------------------

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

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()
    }
//----------------------------------------------------------------------------------------
    // checkmarks when tapped

    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
    {
        if let cell = tableView.cellForRowAtIndexPath(indexPath) {
            if cell.accessoryType == .Checkmark
            {
                cell.accessoryType = .None
            }
            else
            {
                cell.accessoryType = .Checkmark
            }
        }    
    }
//----------------------------------------------------------------------------------------
    //number of sections for the table

    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 5
    }
//----------------------------------------------------------------------------------------
    //Calculate the amount of rows

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
    {
        return self.section1.count;
    }
//----------------------------------------------------------------------------------------
    //Cells text label and config

    func tableView(tableView: UITableView,cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
    {
        let cell:UITableViewCell = UITableViewCell(style:UITableViewCellStyle.Default, reuseIdentifier:"cell")
        cell.textLabel!.text = section1[indexPath.row]
        cell.textLabel!.numberOfLines = 0

        return cell
    }

//----------------------------------------------------------------------------------------

    @IBAction func resetswitch(sender: UIButton) {




    }
//----------------------------------------------------------------------------------------

}

斯威夫特 > 3.0

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    if let cell = tableView.cellForRow(at: indexPath) {
        cell.accessoryType = .none
    }
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if let cell = tableView.cellForRow(at: indexPath) {
        cell.accessoryType = .checkmark

    }
}

我通过使用两个 Swift 函数来解决：didSelectRowAtIndexPath 和 didDeselectRowAtIndexPath。

override func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
    if let cell = tableView.cellForRowAtIndexPath(indexPath) {
        cell.accessoryType = .None
    }
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    if let cell = tableView.cellForRowAtIndexPath(indexPath) {
        cell.accessoryType = .Checkmark

    }
}

为了使其正常工作，请在 cellForRowAtIndexPath 函数中添加一行代码，以便在屏幕上绘制表视图时选择一行，否则在您第一次选择另一行时将不会调用 didDeselectRowAtIndexPath 。就像这样：

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("cellData", forIndexPath: indexPath) 
    if (some condition to initially checkmark a row)
        cell.accessoryType = .Checkmark
        tableView.selectRowAtIndexPath(indexPath, animated: false, scrollPosition: UITableViewScrollPosition.Bottom)
    } else {
        cell.accessoryType = .None
    }

    return cell
}