如何在 cell.swift 中获取 indexPath.row [英] How can I get indexPath.row in cell.swift

问题描述

我有 2 个文件.

• myTableViewController.swift
• myTableCell.swift

我可以在 myTabelCell.swift 函数中获取 indexPath.row 吗?

Can I get the indexPath.row in myTabelCell.swift function?

这里是 myTableCell.swift

Here is myTableCell.swift

import UIKit
import Parse
import ActiveLabel

class myTableCell : UITableViewCell {

    //Button
    @IBOutlet weak var commentBtn: UIButton!
    @IBOutlet weak var likeBtn: UIButton!
    @IBOutlet weak var moreBtn: UIButton!


    override func awakeFromNib() {
        super.awakeFromNib()


    }

    @IBAction func likeBtnTapped(_ sender: AnyObject) {

        //declare title of button
        let title = sender.title(for: UIControlState())

        //I want get indexPath.row in here!

    }

这里是 myTableViewController.swift

Here is myTableViewController.swift

class myTableViewController: UITableViewController {

    //Default func
    override func viewDidLoad() {
        super.viewDidLoad()

        //automatic row height
        tableView.estimatedRowHeight = 450
        tableView.rowHeight = UITableViewAutomaticDimension



    }

 // cell config
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


        //define cell
        let cell = tableView.dequeueReusableCell(withIdentifier: "myTableCell", for: indexPath) as! myTableCell



 }

如您所见...我正在尝试在 myTableCell 中获取 indexPath.row，liktBtnTapped 函数.

As you can see... I'm trying to get indexPath.row in myTableCell, liktBtnTapped function.

你能告诉我如何访问或获取 IndexPath.row 吗?

Could you let me know how can I access or get IndexPath.row?

推荐答案

我创建了一个带有递归方法的 UIResponder 扩展，你可以在任何 UIView(它继承自 UIResponder) 以查找特定类型的父视图.

I have created a UIResponder extension with a recursive method that you can use in any UIView (which inherits from UIResponder) to find a parent view of a specific type.

import UIKit

extension UIResponder {
    /**
     * Returns the next responder in the responder chain cast to the given type, or
     * if nil, recurses the chain until the next responder is nil or castable.
     */
    func next<U: UIResponder>(of type: U.Type = U.self) -> U? {
        return self.next.flatMap({ $0 as? U ?? $0.next() })
    }
}

使用它，我们可以扩展 UITableViewCell 为表格视图和单元格的索引路径提供一些方便的只读计算属性.

Using this, we can extend UITableViewCell with some convenient read-only computed properties for the table view and index path of the cell.

extension UITableViewCell {
    var tableView: UITableView? {
        return self.next(of: UITableView.self)
    }

    var indexPath: IndexPath? {
        return self.tableView?.indexPath(for: self)
    }
}

以下是您在示例中的使用方法:

Here is how you could use it in your example:

@IBAction func likeBtnTapped(_ sender: AnyObject) {
    //declare title of button
    let title = sender.title(for: UIControlState())

    //I want get indexPath.row in here!
    self.indexPath.flatMap { print($0) }
}

这篇关于如何在 cell.swift 中获取 indexPath.row的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！