点击表格视图中的按钮 - 错误的单元格 [英] Tap button in tableview - wrong cell

问题描述

我试图在单元格中传递一个变量，这是当我单击单元格中的按钮时的标签.但问题是每当我将代码放入 cellForRowAtIndexPath 时，它每次都会从错误的单元格中获取标签.为什么以及如何解决这个问题?

Hi I am trying to pass a variable in the cell which is the label when i click on a button in the cell. but the problem is every when I put the code in cellForRowAtIndexPath, it gets the label from the wrong cell every time. why and how to fix this?

var variableToPass: String!

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell : MainCell! = tableView.dequeueReusableCellWithIdentifier("MainCell") as! MainCell

    variableToPass = label1.text

    cell.label1.userInteractionEnabled = true
    let tapButton = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapLabel(_:)))
    cell.label1.addGestureRecognizer(tapButton)

    return cell as MainCell
}

func tapButton(sender:UITapGestureRecognizer) {
    performSegueWithIdentifier("SegueIdentifierName", sender: self)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "SegueIdentifierName" {
        let viewController = segue.destinationViewController as! ViewController
        viewController.getVariablePassed = variableToPass
    }
}

推荐答案

你的代码设置的方式，variableToPass 总是从 dequeueReusableCellWithIdentifier.相反，在您的 tapButton 方法中设置 variableToPass，因为这样您就知道选择了哪个单元格并且您可以正确设置 variableToPass:

The way your code is set up, variableToPass is always the text in the last cell acquired from dequeueReusableCellWithIdentifier. Instead, set variableToPass in your tapButton method, because then you know what cell was selected and you can correctly set variableToPass:

func tapButton(sender:UITapGestureRecognizer) {
    let label = sender.view as! UILabel
    self.variableToPass = label.text
    performSegueWithIdentifier("SegueIdentifierName", sender: self)
}

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