UITableView 中带有布尔值的切换按钮 Swift

toggle button with boolean in UITableView Swift

我想添加一个布尔切换以了解按钮是否已被按下(会将此值保存到核心数据(如果为真,还想将单元格数据保存到核心数据,如果为假,则从核心数据中删除) ) 我不知道该怎么做。任何帮助将不胜感激。如果需要来自视图控制器的所有代码,请发表评论,我会这样做(我已经设置了 xcdatamodel)。

  @IBAction func buttonTapped(_ sender:UIButton) {
    var superView = sender.superview
    while !(superView is UITableViewCell) {
        superView = superView?.superview
    }
    let cell = superView as! UITableViewCell
    if let indexpath = tableView.indexPath(for: cell){

        print(indexpath)
    }
}

将 属性 添加到您的自定义单元格,例如:

var indexPath: IndexPath = IndexPath(row: -1, section: -1)  //The -1 just know when it is not set yet

并且在 cellForRow 的 tableView 中:

cell.indexpath = indexPath

假设 buttonTapped 在您的自定义单元格中定义 class:

@IBAction func buttonTapped(_ sender:UIButton) {
    print(indexpath)
}

向您的单元格添加委托方法- (void)myCell:(MyCell *)cell didTapButton:(UIButton *)button

那么在您的 VC 中,您可以从单元格对象向后工作。

- (void)myCell:(MyCell *)cell didTapButton:(UIButton *)button
{
    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
    MyObject *object = [self.dataSource objectAtIndexPath:indexPath];

    // Do something with the knowledge that the button in the cell for the object was tapped... 

    // For example
    object.tapped = YES;
    [object.managedObjectContext save:NULL];
}

只需要转换成swift ;)

好吧,我构建了一个简单的项目,并使用协议想出了一些办法, 首先你定义一个这样的协议:

protocol cellDidRequestSaving {
     func saveOrDelete(indexpath : Int)
}

首先在您的单元格中定义按钮,如下所示:

class TableViewCell: UITableViewCell {
    var delegate: cellDidRequestSaving?
    var indexPath = 0 //come from the parent
    override func awakeFromNib() {
         super.awakeFromNib()

         // Initialization code
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
         super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

    @IBAction func didTap(_ sender: Any) {
        // this protocol defined in the parent
        delegate?.saveOrDelete(indexpath: indexPath)

    }
}

现在你 tableViewController 你使用这样的协议:

 class TableViewController: UITableViewController, cellDidRequestSaving {
     var cellStat = [Int:Bool]()
     override func viewDidLoad() {
         super.viewDidLoad()

        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem
    }

    // 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 {
        // #warning Incomplete implementation, return the number of rows
         return 3
    }

     override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
         let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
         cell.indexPath = indexPath.row
         cell.delegate = self
        // Configure the cell...

         return cell
    }
     func saveOrDelete(indexpath: Int) {
         if let status = cellStat[indexpath], status {
            print(indexpath, "delete")
             cellStat[indexpath] = !status
        }
         else {
            print(indexpath, "save")
             cellStat[indexpath] = true
        }
    }

这是一个简单的项目,但您可以了解如何做。另外,请注意协议定义和用法,这样您就不会错过任何东西。 输出结果是