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[英]UITextField doesn't end editing when Button clicked( delegate textFieldDidEndEditing )
[英]UITextField doesn't end editing in a UITableViewCell in Swift 4
我还是个新手,请教一下。 预先感谢您,我的英语不好。
我的目标是:
用户点击表格行中的编辑按钮。 出现UITextField
而不是单元格。 输入值并按Return
键后, UITextField
再次消失,并重新计算单元格。
按下editButton
>隐藏priceCell
&显示UITextField
&显示键盘并开始编辑/输入值(闪烁的光标)->通过按Return
键停止编辑/输入值执行->隐藏UITextField
&显示priceCell
&将输入的值保存到数组中并重新加载已编辑行
我用这个答案作为开始的蓝图。
我也想使用.decimalPad
键盘来更容易地输入数字值,并限制用户仅使用数字(和小数点),但这不包括将Return
键用作停止编辑,对吗?
我找到了可能的解决方案,但对我来说,这似乎很复杂...
我的ViewController:
import UIKit
class PortfolioViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UITextFieldDelegate, PortfolioCellDelegate {
let getData = GetData()
...
override func viewDidLoad() {
super.viewDidLoad()
cellTableView.delegate = self
cellTableView.dataSource = self
cellTableView.register(UINib(nibName: "PortfolioCell", bundle: nil), forCellReuseIdentifier: "portfolioCell")
self.currencyControl.selectedSegmentIndex = MyVariables.currencyControlSelected
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let coinCell = tableView.dequeueReusableCell(withIdentifier: "portfolioCell", for: indexPath) as! PortfolioCell
...
coinCell.delegate = self
return coinCell
}
...
func portfolioButtonPressed(coinCell: PortfolioCell) {
let indexPath = self.cellTableView.indexPathForRow(at: coinCell.center)!
let selectedCell = cellTableView.cellForRow(at: indexPath) as! PortfolioCell
selectedCell.priceCell.isHidden = true
selectedCell.textCell.isHidden = false
selectedCell.textCell.delegate = self
func textFieldDidEndEditing(textField: UITextField) {
let owned: Double = Double(textField.text!)!
if owned >= 0 {
MyVariables.dataArray[indexPath.row].ownedCell = owned
} else {
MyVariables.dataArray[indexPath.row].ownedCell = 0.00
}
selectedCell.priceCell.isHidden = false
selectedCell.textCell.isHidden = true
self.cellTableView.reloadData()
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
selectedCell.textCell.resignFirstResponder()
return true
}
}
...
}
我的自定义单元格:
import UIKit
protocol PortfolioCellDelegate {
func portfolioButtonPressed(coinCell: PortfolioCell)
}
class PortfolioCell: UITableViewCell {
var delegate: PortfolioCellDelegate?
...
@IBAction func editCellPressed(_ sender: UIButton) {
delegate?.portfolioButtonPressed(coinCell: self)
}
...
}
现在,当按下按钮时,会显示正确的UITextField
,但在按下Return
键后不要关闭。
还是应该完全更改它并使用点击手势?
要结束任何一种scrollView的编辑,只需使用此
cellTableView.keyboardDismissMode = .onDrag
要么
cellTableView.keyboardDismissMode = .interactive
与tableView交互时,它将隐藏键盘
对于数字小键盘,您可以将工具栏添加为textField的inputAccessoryView。 在工具栏上,添加取消按钮以关闭键盘。
有两种方法:
1.)委托2.)IQKeyboardManager
1.)使用UITextFieldDelegate
有一个名为“ textFieldShouldEndEditing”的特定回调。在此方法中,返回true。
2.)使用IQKeyboardManager一个衬垫库。 该库自动管理所有TextField和scrollview。 您可以在AppDelegate中用一行激活它,因此易于使用。
工作,但不像想要的那样光滑,而且我也无法使IQKeyboardManager
工作,所以我确实使用了inputAccessoryView
。
自定义单元:
import UIKit
protocol PortfolioCellDelegate {
func portfolioButtonPressed(didSelect coinCell: PortfolioCell)
func portfolioButtonPressed(coinCell:PortfolioCell, editingChangedInTextCell newValue:String)
}
class PortfolioCell: UITableViewCell, UITextFieldDelegate {
var delegate: PortfolioCellDelegate?
...
@IBAction func editCellPressed(_ sender: UIButton) {
textCell.becomeFirstResponder()
delegate?.portfolioButtonPressed(didSelect: self)
}
@IBAction func textCellValueChanged(_ sender: UITextField) {
if (sender.text?.isEmpty)! {
delegate?.portfolioButtonPressed(coinCell: self, editingChangedInTextCell: "XXX")
} else {
let text = sender.text
delegate?.portfolioButtonPressed(coinCell: self, editingChangedInTextCell: text!)
}
}
override func awakeFromNib() {
super.awakeFromNib()
self.textCell.delegate = self
let flexiableSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
let doneButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.done, target: self, action: #selector(self.doneButtonAction))
let toolBar:UIToolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: frame.size.width, height: 35))
toolBar.barTintColor = UIColor(red:0.15, green:0.69, blue:0.75, alpha:1.0)
toolBar.tintColor = UIColor(red:0.93, green:0.93, blue:0.93, alpha:1.0)
toolBar.setItems([flexiableSpace, doneButton], animated: false)
textCell.inputAccessoryView = toolBar
textCell.keyboardType = UIKeyboardType.decimalPad
}
@objc func doneButtonAction() {
textCell.endEditing(true)
}
...
}
ViewController:
import UIKit
class PortfolioViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, PortfolioCellDelegate {
let getData = GetData()
...
override func viewDidLoad() {
super.viewDidLoad()
cellTableView.delegate = self
cellTableView.dataSource = self
cellTableView.register(UINib(nibName: "PortfolioCell", bundle: nil), forCellReuseIdentifier: "portfolioCell")
self.currencyControl.selectedSegmentIndex = MyVariables.currencyControlSelected
getData.delegate = self
timeStampLabel.text = MyVariables.timeStamp
}
override func viewDidAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.cellTableView.reloadData()
self.currencyControl.selectedSegmentIndex = MyVariables.currencyControlSelected
self.timeStampLabel.text = MyVariables.timeStamp
}
//MARK: - tableView
/***************************************************************/
...
func portfolioButtonPressed(coinCell: PortfolioCell, editingChangedInTextCell newValue: String) {
let indexPath = self.cellTableView.indexPathForRow(at: coinCell.center)!
let selectedCell = cellTableView.cellForRow(at: indexPath) as! PortfolioCell
selectedCell.priceCell.isHidden = false
selectedCell.textCell.isHidden = true
if newValue != "XXX" {
let owned: Double = Double(newValue)!
MyVariables.dataArray[indexPath.row].ownedCell = owned
}
selectedCell.priceCell.isHidden = false
selectedCell.textCell.isHidden = true
self.cellTableView.reloadRows(at: [indexPath], with: .automatic)
}
func portfolioButtonPressed(didSelect coinCell: PortfolioCell) {
let indexPath = self.cellTableView.indexPathForRow(at: coinCell.center)!
let selectedCell = cellTableView.cellForRow(at: indexPath) as! PortfolioCell
selectedCell.priceCell.isHidden = true
selectedCell.textCell.isHidden = false
}
...
}
这很容易:您应该选择该表格视图单元,然后在属性检查器中启用“启用用户交互” 。
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