正在检测的文本字段应从TableViewController中的自定义TableViewCell返回以添加新行

Question

当用户在包含TextField的Custom TableViewCell中按下返回键时，我想在我的TableView中添加新行。但是，我找不到这样做的方法…如何在TableView中查看TextField的事件，以便添加行？

我的TableViewController

class TableViewController: UITableViewController, CustomCellDelegate,
UITextFieldDelegate {
var rowCount = 1
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
// MARK: - Table view data source
...
// Doesn't Do Anything
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
let indexPath = IndexPath(row: rowCount-1, section: 1)
tableView.insertRows(at: [indexPath], with: .automatic)
view.endEditing(true)
return true
}
// Also does nothing
func didReturn(cell: AddActivityTableViewCell, string: String?) {
let indexPath = IndexPath(row: rowCount-1, section: 1)
tableView.insertRows(at: [indexPath], with: .automatic)
view.endEditing(true)
rowCount += 1
}

我的自定义表格查看单元格

protocol CustomCellDelegate: class {
func didReturn(cell: CustomTableViewCell, string: String?)
}
class CustomTableViewCell: UITableViewCell, UITextFieldDelegate {
@IBOutlet weak var textField: UITextField!
weak var delegate: CustomCellDelegate?
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
textField.delegate = self
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
public func configureTextField(text: String?, placeholder: String) {
textField.text = text
textField.placeholder = placeholder
textField.accessibilityValue = text
textField.accessibilityLabel = placeholder
}
public func editableTextField(editable: Bool) {
if editable == true {
textField.isEnabled = true
} else {
textField.isEnabled = false
}
}
// This works
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
delegate?.didReturn(cell: self, string: textField.text)
return true
}
}

谢谢！

Answer 1

我想您错过了单元格中设置的委托。请找到下面的代码，它对我来说很好

ViewController

class TableViewController: UITableViewController, CustomCellDelegate, UITextFieldDelegate {

var rowCount = 1
override func viewDidLoad() {
super.viewDidLoad()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return rowCount
}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell : CustomTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomTableViewCell
cell.textField.placeholder = "Row (indexPath.row)"
cell.delegate = self
return cell
}
func didReturn(cell: CustomTableViewCell, string: String?) {
rowCount += 1
let indexPath = IndexPath(row: rowCount-1, section:0)
tableView.beginUpdates()
tableView.insertRows(at: [indexPath], with: .automatic)
tableView.endUpdates()
view.endEditing(true)
}

}

自定义单元格

protocol CustomCellDelegate: class {
func didReturn(cell: CustomTableViewCell, string: String?)
}
class CustomTableViewCell: UITableViewCell, UITextFieldDelegate {
@IBOutlet weak var textField: UITextField!
weak var delegate: CustomCellDelegate?
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
textField.delegate = self
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
public func configureTextField(text: String?, placeholder: String) {
textField.text = text
textField.placeholder = placeholder
textField.accessibilityValue = text
textField.accessibilityLabel = placeholder
}
public func editableTextField(editable: Bool) {
if editable == true {
textField.isEnabled = true
} else {
textField.isEnabled = false
}
}
// This works
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
delegate?.didReturn(cell: self, string: textField.text)
return true
}
}