UITableView内部嵌入UITextView编辑时自适应高

代码如下，其中关键是不要使用contentoffset改变位置，而是直接改变tableview的frame ，这样在刷新时才不会导致位置改变

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
 // storyboard引入的 tableview
@IBOutlet weak var tableview: UITableView!
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    tableview.register(cell.self, forCellReuseIdentifier: "cell")
    tableview.delegate = self
    tableview.dataSource = self
    
    // 添加键盘通知
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}

@objc func keyboardWillShow(_ noti : Notification) {
    for index in 0..<13 {
        let cell = tableview.cellForRow(at: IndexPath(row: index, section: 0)) as! cell
        if cell.textView.isFirstResponder {
            
            let beginValue = noti.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue

            let keyboardTop = UIScreen.main.bounds.size.height - (UIApplication.shared.statusBarFrame.size.height + 44) - (beginValue?.cgRectValue.size.height ?? 0)
            
            let inputBottom = cell.frame.maxY - tableview.contentOffset.y

            if (keyboardTop < inputBottom) {
                
                let offsetY = inputBottom - keyboardTop
                tableview.frame = CGRect(x: 0, y: -(tableview.contentOffset.y + offsetY + 25), width: tableview.frame.size.width, height: tableview.frame.size.height)
            }
            break;
        }
    }
}
@objc func keyboardWillHide(_ noti : Notification) {
    
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 13
}

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

    return cell
}

//    func scrollViewDidScroll(_ scrollView: UIScrollView) {
//        if scrollView.isTracking {
//            self.view.endEditing(true)
//        }
//    }
}

class cell : UITableViewCell, UITextViewDelegate {

var textView = UITextView()

override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    contentView.backgroundColor = .red
    // 初始化 textView 并设置基本属性
    textView.font = UIFont.systemFont(ofSize: 16)
    textView.textColor = .black
    textView.backgroundColor = .gray
    // 将 textView 添加到 contentView 中
    contentView.addSubview(textView)

    // 设置 textView 的自动布局
    textView.translatesAutoresizingMaskIntoConstraints = false
    NSLayoutConstraint.activate([
        textView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 5),
        textView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 5),
        textView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -5),
        textView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -5),
        textView.heightAnchor.constraint(greaterThanOrEqualToConstant: 35)
    ])

    textView.delegate = self
}

required init?(coder: NSCoder) {
    super.init(coder: coder)
}

func textViewDidChange(_ textView: UITextView) {
    // 计算文本内容需要的高度
    let size = CGSize(width: textView.bounds.width, height: .infinity)
    let estimatedSize = textView.sizeThatFits(size)

    // 更新 textView 的高度约束
    if let heightConstraint = textView.constraints.first(where: { $0.firstAttribute == .height }) {
        heightConstraint.constant = max(35, estimatedSize.height)
    }

    // 通知 tableView 更新 cell 高度
    if let tableView = self.superview as? UITableView {
        tableView.beginUpdates()
        tableView.endUpdates()
    }
 }
}