didEndEditingRowAt未与自定义表格视图单元格一起调用

时间:2018-09-11 12:56:13

标签: ios swift uitableview

我有一个表视图(SettingsViewController),它用作显示用户信息(名称,电子邮件,电话号码等)的用户信息视图。这类似于标准的iOS联系人页面。

每个单元格都有一个沿单元格大小扩展的文本字段,因此,一旦进入“编辑”模式,用户就可以更新其信息。

我还有一个自定义单元格(SettingsCell),可在其中使用文本字段等设置单元格。

SettingsViewController(不包括许多tabelview设置代码):

class SettingsViewController: UITableViewController{

    let cellId = "cellId"

    var apiController: APIController?

    var firstName: String?
    var lastName: String?
    var email: String?
    var phoneNumber: String?

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .mainWhite()
        tableView = UITableView(frame: CGRect.zero, style: .grouped)
        tableView.register(SettingsCell.self, forCellReuseIdentifier: cellId)

        setupNavigation()

    }

    fileprivate func setupNavigation() {
        editButtonItem.action = #selector(showEditing)
        editButtonItem.title = "Edit"
        editButtonItem.tintColor = .mainWhite()
        self.navigationItem.rightBarButtonItem = editButtonItem
    }


    @objc func showEditing(sender: UIBarButtonItem)
    {
        if(self.tableView.isEditing == false)
        {
            self.tableView.isEditing = true
            self.navigationItem.rightBarButtonItem?.title = "Save"
            self.tableView.reloadData()
        }
        else
        {
            self.tableView.isEditing = false
            self.navigationItem.rightBarButtonItem?.title = "Edit"
            self.tableView.reloadData()
        }
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! SettingsCell

        if self.tableView.isEditing == true {
            cell.textField.isEnabled = true

            if indexPath.section == 2 {
                cell.textField.keyboardType = .phonePad
            }
        } else {
            cell.textField.isEnabled = false
        }

        cell.selectionStyle = .none

        filloutUserInfo(indexPath: indexPath, cell: cell)

        return cell
    }

    override func tableView(_ tableView: UITableView, shouldIndentWhileEditingRowAt indexPath: IndexPath) -> Bool {
        return false
    }

    //THIS NEVER GETTING EXECUTED
    override func tableView(_ tableView: UITableView, didEndEditingRowAt indexPath: IndexPath?) {
        print("editing done for row \(indexPath?.item)")
    }

    override func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCellEditingStyle {
        return .none
    }

}

设置单元格:

class SettingsCell: UITableViewCell, UITextFieldDelegate {

    let textField: UITextField = {
        let tf = UITextField()
        tf.isEnabled = false
        return tf
    }()

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        addSubview(textField)
        textField.anchor(top: topAnchor, left: leftAnchor, bottom: bottomAnchor, right: rightAnchor, paddingTop: 0, paddingLeft: 8, paddingBottom: 0, paddingRight: 8, width: 0, height: 0)

        textField.addDoneButtonOnKeyboard()
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

我现在遇到的问题是,进入编辑模式并更改了给定单元格的文本后,表视图实际上无法识别出这一点。 didEndEditingRowAt永远不会调用,并且永远不会显示该打印语句。我怀疑这与文本字段没有以任何方式连接到tableviewcontroller有关,但是我不确定如何解决此问题。

我需要能够知道用户何时完成编辑,以显示有关格式不正确和禁用保存按钮的警报。

1 个答案:

答案 0 :(得分:1)

您需要实现一个回调以侦听textField中的SettingsCell endEditing事件到您的ViewController

要实现这一目标,请参见更新后的SettingsCell

class SettingsCell: UITableViewCell, UITextFieldDelegate {

    let textField: UITextField = {
        let tf = UITextField()
        tf.isEnabled = false
        tf.addDoneButtonOnKeyboard()
        return tf
    }()

    public var onEndEditing: ((String?) -> Void)?

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        textField.removeFromSuperview()
        addSubview(textField)
        textField.delegate = self

        textField.anchor(top: topAnchor, left: leftAnchor, bottom: bottomAnchor, right: rightAnchor, paddingTop: 0, paddingLeft: 8, paddingBottom: 0, paddingRight: 8, width: 0, height: 0)
    }

    func textFieldDidEndEditing(_ textField: UITextField) {
        self.onEndEditing?(textField.text)
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

现在更新cellForRowAt来监听endEditing事件,如下所示,

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! SettingsCell

    if self.tableView.isEditing == true {
        cell.textField.isEnabled = true
        cell.onEndEditing = { text in 
            print("Cell Editing finished with text: \(text)")
         }
        if indexPath.section == 2 {
            cell.textField.keyboardType = .phonePad
        }
    } else {
        cell.textField.isEnabled = false
    }

    cell.selectionStyle = .none

    filloutUserInfo(indexPath: indexPath, cell: cell)

    return cell
}