表视图单元格中的UIButton操作 [英] UIButton action in table view cell

问题描述

我正在尝试为在表格视图单元格中按下的按钮运行操作。以下代码位于我的表视图控制器类中。

I am trying to run an action for a button being pressed within a table view cell. The following code is in my table view controller class.

在我的UITableViewCell类中名为requestsCell的插座中，该按钮被描述为是。

The button has been described as "yes" in an outlet in my class of UITableViewCell called requestsCell.

我正在使用Parse来保存数据，并希望在按下按钮时更新对象。我的objectIds数组工作正常，cell.yes.tag也会将正确的数字打印到日志中，但是，为了正确运行我的查询，我无法将该数字输入到连接函数中。

I am using Parse to save data and would like to update an object when the button is pressed. My objectIds array works fine, the cell.yes.tag also prints the correct number to the logs, however, I cannot get that number into my "connected" function in order to run my query properly.

我需要一种方法来获取单元格的indexPath.row以找到正确的objectId。

I need a way to get the indexPath.row of the cell to find the proper objectId.

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as requestsCell

    // Configure the cell...

    cell.name.text = requested[indexPath.row]

    imageFiles[indexPath.row].getDataInBackgroundWithBlock{
        (imageData: NSData!, error: NSError!) -> Void in

        if error == nil {

            let image = UIImage(data: imageData)

            cell.userImage.image = image
        }else{
            println("not working")
        }    
    }

    cell.yes.tag = indexPath.row
    cell.yes.targetForAction("connected", withSender: self)

    println(cell.yes.tag)

    return cell
}


func connected(sender: UIButton!) {

    var query = PFQuery(className:"Contacts")
    query.getObjectInBackgroundWithId(objectIDs[sender.tag]) {
        (gameScore: PFObject!, error: NSError!) -> Void in
        if error != nil {
            NSLog("%@", error)
        } else {
            gameScore["connected"] = "yes"
            gameScore.save()
        }
    }

}

推荐答案

您需要为该按钮添加目标。

You need to add target for that button.

myButton.addTarget(self, action: "connected:", forControlEvents: .TouchUpInside)

当然你需要设置该按钮的标签，因为您正在使用它。

And of course you need to set tag of that button since you are using it.

myButton.tag = indexPath.row

您可以通过继承UITableViewCell来实现这一目标。在界面构建器中使用它，在该单元格上放置一个按钮，通过插座连接它，然后你去。

You can achieve this by subclassing UITableViewCell. Use it in interface builder, drop a button on that cell, connect it via outlet and there you go.

编辑：
要在连接函数中获取标记：

To get the tag in the connected function:

func connected(sender: UIButton){
    let buttonTag = sender.tag
}

EDIT2：

这个答案是针对swift 1.2提供的，正如评论中所建议的那样，swift 2.2的语法略有不同。

This answer was provided for swift 1.2, as suggested in comments, syntax is a little different for swift 2.2.

myButton.addTarget(self, action: #selector(ClassName.FunctionName(_:), forControlEvents: .TouchUpInside)

EDIT3：

更新为Swift 3

Updated for Swift 3

myButton.addTarget(self, action: #selector(ClassName.FunctionName.buttonTapped), for: .touchUpInside)

EDIT4：

更新为Swift 4

Updated for Swift 4

@objc func connected(sender: UIButton){
        let buttonTag = sender.tag
}

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