PROSAGA码农传奇-swift/objective-C-在UITableview（Swift）中将目标添加到UITextField

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    可能是你的崩溃是由于你这样做：
  
   <pre>
 <code>
 textField.addTarget(self, action: #selector(AirInputViewController.textFieldDidChange(_:)), for: UIControl.Event.editingChanged)

</code>
 </pre>
  
    这里
     <code>
 self
 </code>
     是
     <code>
 TextFieldCell
 </code>
    ，所以我认为它试图去检查一下
     <code>
 AirInputViewController
 </code>
     在里面
     <code>
 TextFieldCell
 </code>
    ，情况并非如此。
  
  
    我会做：
  
   <pre>
 <code>
 class TextFieldCell: UITableViewCell {

weak var delegate: TextFieldCellDelegate?

lazy var textField: UITextField = {
        // same you have
    }()

textField.addTarget(self, action: #selector(textFieldDidChange(_:)), for: UIControl.Event.editingChanged)

@objc func textFieldDidChange(_ textField: UITextField) {
        delegate?.textFieldDidChange(textField)
    }

</code>
 </pre>
  
    创建一个花哨的委托：
  
   <pre>
 <code>
 protocol TextFieldCellDelegate: class {
 func textFieldDidChange(_ textField: UITextField)
}

class AirInputViewController: TextFieldCellDelegate {

func textFieldDidChange(_ textField: UITextField) {
        // textField just changed!
    }

// IMPORTANT! Set the delegate for the cell!

func tableView(...cellForRow...) {
        let cell = ... as! TextFieldCell
        cell.delegate = self
        ...
        return cell
    }
}

</code>
 </pre>
  
    希望有所帮助。
  
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