Question

我有一个TableView，我显示所有数据，每个单元格可能有1-2个按钮。我阅读了很多主题，并了解如何通过ViewController为每个按钮添加目标。由于这些按钮将转发到同一个VC并显示图像，因此我有以下代码。在我的TableViewCell子类中，我有2个按钮

class CODetailsTicketCell: UITableViewCel {

      var onButtonTapped: (() -> Void)? = nil

      @IBAction func firstBtnTapped(_ sender: UIButton) {
          if let onButtonTapped = self.onButtonTapped {
              onButtonTapped()
          }
         print("First button was pressed")

     }

      @IBAction func secondBtnTapped(_ sender: UIButton) {
          if let onButtonTapped = self.onButtonTapped {
             onButtonTapped()
          }
          print("Second button was pressed")
     }
}

在我的ViewController in cellForRowAt indexPath中，我有以下代码

let message = messages[indexPath.row]

if let cell = tableView.dequeueReusableCell(withIdentifier: "COTicketsCell", for: indexPath) as? CODetailsTicketCell {
    cell.configureCell(openTickets: message)
    cell.onButtonTapped = {
         self.performSegue(withIdentifier: "toImageVC", sender: message)
     } 

     return cell

为了通过segue传递数据，我在prepareForSegue

中使用以下代码

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "toImageVC" {
        let navigationController = segue.destination as? UINavigationController
        if let targetController = navigationController?.topViewController as? ImageVC {
            if let data = sender as? OpenTicketsData {
                targetController.loadImageURL = URL(string: data.firstImageUrl)
            }

        }
    }
}

一切正常，但我无法在prepareForSegue中检查按钮标记。基本上，目前两个按钮都发送相同的数据

targetController.loadImageURL = URL(string: data.firstImageUrl)

如何根据按下的按钮传递数据？我试图做这样的事情，但似乎错了，没有工作。

let button = sender as? UIButton
if let data = sender as? OpenTicketsData {
   if button?.tag == 1 {
      targetController.loadImageURL = URL(string: data.firstImageUrl)
   } else if button?.tag == 2 {
      targetController.loadImageURL = URL(string: data.secondImageUrl)
   }
}

Answer 1

您可以将其分为2个不同的事件或

class CODetailsTicketCell: UITableViewCell {

      var onButtonTapped: ((_ sender: UIButton) -> Void)? = nil

      @IBAction func firstBtnTapped(_ sender: UIButton) {
          if let onButtonTapped = self.onButtonTapped {
              onButtonTapped?(sender)
          }
         print("First button was pressed")

     }

      @IBAction func secondBtnTapped(_ sender: UIButton) {
          if let onButtonTapped = self.onButtonTapped {
              onButtonTapped(sender)
          }
          print("Second button was pressed")
     }
}

在onButtonTapped的作业中，如果您使用[weak self]来避免保留周期，请务必添加self。

cell.onButtonTapped = { [weak self] sender in
    if sender.tag == 1 {
        // Do something
    } else {
        // Do other thing
    }
}

传递数据取决于tableView单元格

1 个答案: