ios - 协议未传递给 ViewController (Swift)

Question

所以我定义了 ClickableCell 协议，它应该响应图像上的点击手势。我想在用户点击图像时重定向到 ViewController2，所以我的方法是定义一个协议，将点击的信息传递给 CurrentViewController，并使用 CurrentViewController 中的协议重定向到 ViewController2。但是我使用了打印语句，它只打印了“TAP TAP TAP”和“DONE”，而不是来自 CurrentViewController 的部分。谁能帮我找出问题所在？谢谢！

MessageCell.swift

protocol ClickableCell {

    func onTapImage(indexPath: IndexPath)

}

class MessageCell: UITableViewCell {



    @IBOutlet weak var leftImage: UIImageView!
    var cellDelegate: ClickableCell?
      var index: IndexPath?

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

    @objc func imageTapped(tapGestureRecognizer: UITapGestureRecognizer){
        print("TAP TAP TAP")
        cellDelegate?.onTapImage(indexPath: index!)
        print("DONE")
    }


    func setupLabelTap() {
        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.imageTapped(tapGestureRecognizer:)))
        self.leftImage.isUserInteractionEnabled = true
        self.leftImage.addGestureRecognizer(tapGestureRecognizer)

    }

}

当前视图控制器

extension CurrentViewController: ClickableCell {

    func onTapImage(indexPath: IndexPath) {
        print("Doesn't Print This")

         let popOverVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(identifier: "nextView") as! UIViewController
        self.navigationController?.pushViewController(popOverVC, animated: true)
    }


}

标签： iosswiftsegueprotocols

Answer 1

您需要cellDelegate在创建单元格时分配它

extension CurrentViewController: UITableViewDataSource {
  // other your code here

  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
     let cell = tableView.dequeueReusableCell(withIdentifier: "your_message_cell_id", 
          for: indexPath) as! MessageCell

     /// other setup code here

     cell.cellDelegate = self // << here !!
     return cell
  }
}