我试图通过使用代码在UITableViewCell内创建UITextField，但此刻，我在“ cellForRowAt”内创建“ cell.mainTextField.delegate = self”时，该文本字段停止允许发短信，就像被禁用一样。同样，该函数shouldChangeCharactersIn（）不在运行。
关于我在做什么错的任何想法吗？谢谢！
var publishing_TableView: UITableView?
类发布：
class Publishing: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
publishing_TableView = {
let table = UITableView(frame: CGRect(x: 0, y: self.navigationController!.navigationBar.bounds.height, width: view.frame.width, height: view.frame.height), style: .grouped)
table.backgroundColor = UIColor(white: 1, alpha: 1)
table.delegate = self
table.dataSource = self
table.register(Publishing_MainTextField.self, forCellReuseIdentifier: "cell")
table.separatorStyle = .none
table.isScrollEnabled = true
return table
}
view.addSubview(publishing_TableView!)
}
}
表格视图功能：
extension Publishing: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let viewForHeader: UIView = UIView.init(frame: CGRect(x:0, y:0, width: view.frame.width, height: 0));
viewForHeader.backgroundColor = .white
return viewForHeader
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 0
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
switch indexPath.row {
case 0: return 60
default: return 0
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("selected line: ", indexPath.row)
tableView.deselectRow(at: indexPath, animated: false)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch indexPath.row {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! Publishing_MainTextField
cell.mainTextField.delegate = self
cell.selectionStyle = .none
return cell
default: return UITableViewCell()
}
}
}
表格视图单元格功能：
class StartPublishing_MainTextField: UITableViewCell {
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setupViews()
}
required init? (coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setupViews() {
addSubview(mainTextField)
}
var mainTextField: UITextField = {
var myTextField = UITextField(frame: CGRect(x: 5, y: 5, width: UIScreen.main.bounds.width-2*20, height: 50))
myTextField.placeholder = "Example"
return myTextField
}()
}
TextField委托功能：
extension Publishing: UITextFieldDelegate {
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
var textFieldText: NSString = (textField.text ?? "") as NSString
var textAfterUpdate = textFieldText.replacingCharacters(in: range, with: string)
print("The updated text is: ", textAfterUpdate)
return textAfterUpdate.characters.count <= 30
}
}
最佳答案
import UIKit
class Publishing: UIViewController {
var publishing_TableView : UITableView {
get {
let table = UITableView(frame: CGRect(x: 0, y: self.navigationController!.navigationBar.bounds.height, width: view.frame.width, height: view.frame.height), style: .grouped)
table.backgroundColor = UIColor(white: 1, alpha: 1)
table.delegate = self
table.dataSource = self
table.register(StartPublishing_MainTextField.self, forCellReuseIdentifier: "cell")
table.separatorStyle = .none
table.isScrollEnabled = true
return table
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.view.addSubview(publishing_TableView)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension Publishing: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let viewForHeader: UIView = UIView.init(frame: CGRect(x:0, y:0, width: view.frame.width, height: 0));
viewForHeader.backgroundColor = .white
return viewForHeader
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 0
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
switch indexPath.row {
case 0: return 60
default: return 0
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("selected line: ", indexPath.row)
tableView.deselectRow(at: indexPath, animated: false)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch indexPath.row {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! StartPublishing_MainTextField
cell.mainTextField.delegate = self
cell.selectionStyle = .none
return cell
default: return UITableViewCell()
}
}
}
class StartPublishing_MainTextField: UITableViewCell {
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setupViews()
}
required init? (coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setupViews() {
addSubview(mainTextField)
}
var mainTextField: UITextField = {
var myTextField = UITextField(frame: CGRect(x: 5, y: 5, width: UIScreen.main.bounds.width-10, height: 50))
myTextField.backgroundColor = #colorLiteral(red: 0.2181161642, green: 0.6374218464, blue: 1, alpha: 1)
myTextField.layer.cornerRadius = 4.0
myTextField.layer.borderWidth = 1.0
myTextField.layer.borderColor = #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1)
myTextField.placeholder = "Type here"
return myTextField
}()
}
extension Publishing: UITextFieldDelegate {
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
var textFieldText: NSString = (textField.text ?? "") as NSString
var textAfterUpdate = textFieldText.replacingCharacters(in: range, with: string)
print("The updated text is: ", textAfterUpdate)
return textAfterUpdate.characters.count <= 30
}
}
output
关于ios - 如何在UITableViewCell内创建TextField？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/51958890/