UITableViewCell中的UITextField resignFromFirstResponder时如何触发

Question

我在 UITableViewCell 中有两个 UITextField，我想检查当 secondTextField resignFromFirstResponder 和 firstTextField 和 secondTextField 都为空时，它会显示一个警告标签。请看下面我的代码。

import Foundation
import UIKit
import SnapKit
class TwoTextInputTableViewCell: UITableViewCell {
    let firstTextField = UITextField()
    let secondTextField = UITextField()
    let stackView = UIStackView().then {
        [=10=].axis = .horizontal
        [=10=].distribution = .fillEqually
        [=10=].spacing = 15
    }
    let warningLabel = UILabel().then {
        [=10=].isHidden = true
        [=10=].addCharacterSpacing(-0.1)
        [=10=].font = .systemFont(ofSize: 12)
        [=10=].textColor = UIColor.CommonColor.salmonColor
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String!) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        contentView.addSubviews(stackView, warningLabel)
        stackView.addArrangedSubview(firstTextField)
        stackView.addArrangedSubview(secondTextField)
        stackView.snp.makeConstraints {
            [=10=].left.equalToSuperview().offset(24)
            [=10=].right.equalToSuperview().offset(-24)
            [=10=].top.equalToSuperview().offset(12)
            [=10=].height.equalTo(56)
        }
        warningLabel.snp.makeConstraints {
            [=10=].top.equalTo(stackView.snp.bottom).offset(12)
            [=10=].height.equalTo(16)
            [=10=].left.right.equalTo(stackView)
        }
        
    }
}

一旦退出，我想warningLabel.isHidden = false重新加载tableView的高度，但是怎么办呢？任何答案表示赞赏！谢谢

Answer 1

您可以使用文本字段委托轻松实现它

先向代表们确认

let firstTextField = UITextField()
let secondTextField = UITextField()
firstTextField.delegate = self
secondTextField.delegate = self

观察 textFieldDidEndediting 委托

extension TwoTextInputTableViewCell : UITextFieldDelegate{
    func textFieldDidEndEditing(textField: UITextField) {
            if textField == firstTextField {
            //first textfield  resignFromFirstResponder
           }else if textField == secondTextField{
           //second textfield  resignFromFirstResponder
            }
        }
    }

UITableViewCell中的UITextField resignFromFirstResponder时如何触发

How to trigger when UITextField in UITableViewCell resignFromFirstResponder

uitableview

uitextfield

uikit

swift

snapkit