确定哪些按钮pressed在斯威夫特一个自定义的ListView细胞 [英] Identifying which button pressed in a custom listView cell in Swift

问题描述

我已经为斯威夫特一个ListView自定义单元格。它有两个按钮 - 一个暂停按钮，一个停止按钮。这个想法是，每个行项目重新presents下载，这样用户可以停止和启动独立每个

I've created a custom cell for a listView in Swift. It has two buttons on it - one a 'pause' button and one a 'stop' button. The idea is that each line item represents a download so the user can stop and start each independently.

不过，我需要为每个按钮的@IBAction。我已经在主要的ViewController创建这些果然，当他们勾搭上了，他们触发适当的。

However, I need to create an @IBAction for each of the buttons. I've created these in the main ViewController and sure enough, when they are hooked up, they trigger appropriate.

位我卡上确定哪一行的按钮的标识已经pressed。我假设与该的cellForRowAtIndexPath会工作的东西。

The bit I'm stuck on is identifying an identifier of which row's button has been pressed. I'm assuming something relating to the cellForRowAtIndexPath would work.

我发现下面的code（这是我从有关文本字段类似的问题找到）：

I've found the following code (which I found from a similar question concerning text fields):

@IBAction func startOrPauseDownloadSingleFile(sender: UIButton!) {
    let pointInTable: CGPoint = sender.convertPoint(sender.bounds.origin, toView: self.tableView)
    let cellIndexPath = self.tableView.indexPathForRowAtPoint(pointInTable)
}

不过，我不断收到错误不能援引convertPoint与类型的参数列表（@lvalue CGPoint，toView：$ T6）'。

However I keep getting the error 'Cannot invoke 'convertPoint' with an argument list of type (@lvalue CGPoint, toView: $T6)'.

谁能帮助？

谢谢，

推荐答案

我把你的code和嵌入它变成一个简单的项目。

I took your code and embedded it into a simple project.

在Interface Builder中，我创建了一个的UITableViewController 现场，并设置其类的ViewController。我添加到它的的UITableViewCell ，设置它的标识符细胞，设置其风格自定义，其类CustomCell。然后，我在单元格中的内容查看添加一个UIButton和非暧昧自动约束布局设置它。

In Interface Builder, I created a UITableViewController scene and set its class to "ViewController". I added to it a UITableViewCell, set its identifier to "Cell", set its style to "Custom" and its class to "CustomCell". I then added a UIButton in the cell's contentView and set non ambiguous auto layout constraint to it.

在项目导航，我创建了一个名为的ViewController的新文件，并在其中添加了以下code：

In Project Navigator, I created a new file called "ViewController" and added the following code in it:

import UIKit

class CustomCell: UITableViewCell {

    @IBOutlet weak var button: UIButton!

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override init(style: UITableViewCellStyle, reuseIdentifier: String!) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }

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

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

}

class ViewController: UITableViewController {

    func buttonPressed(sender: AnyObject) {
        let pointInTable: CGPoint = sender.convertPoint(sender.bounds.origin, toView: self.tableView)
        let cellIndexPath = self.tableView.indexPathForRowAtPoint(pointInTable)
        println(cellIndexPath)
    }

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

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

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

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

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 10
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as CustomCell
        cell.selectionStyle = .None

        cell.button.addTarget(self, action: "buttonPressed:", forControlEvents: UIControlEvents.TouchUpInside)

        return cell
    }

}

我终于联系按钮的 IBOutlet中到的UIButton 在Interface Builder，跑项目，并能够登录各单元的indexPaths从每一个按钮的触摸。

I finally linked the button's IBOutlet to the UIButton in Interface Builder, ran the project and was able to log respective cell's indexPaths from each button touch.

这篇关于确定哪些按钮pressed在斯威夫特一个自定义的ListView细胞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！