从自定义的uitableview单元格获取uitextfield数据 - Swift
问题描述:
我与自定义tableview单元格有一个文本框的问题。所以,我有一个单独的类与文本字段的单元格,但我无法检索我的tableview类中的数据。在tableview类和textFieldShouldReturn函数中有一个用于textfield的委托,但当按下“完成”按钮时没有任何反应。哪里可以成为问题?从自定义的uitableview单元格获取uitextfield数据 - Swift
非常感谢!
这里有一个表视图代码:
class MainTVC: UITableViewController, UITextFieldDelegate{
var tableParts: [Dictionary<String, Any>] = []
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
tableParts = [
["type": "title", "data": "Some data", "enabled": true],
["type": "date", "data": "Some data", "enabled": true],
["type": "location", "data": "Loading...", "enabled": true],
]
tableView.reloadData()
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
override func numberOfSections(in tableView: UITableView) -> Int { return 1 }
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return tableParts.count }
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell = tableParts[indexPath.row]
switch(cell["type"] as! String) {
...
case "textbox":
let rTemplateTextBox = tableView.dequeueReusableCell(withIdentifier: "recapTextCell", for: indexPath) as! RTextCell
rTemplateTextBox.textField.text = cell["data"] as? String ?? "No text"
rTemplateTextBox.data = cell
return rTemplateTextBox
default:
let cell = tableView.dequeueReusableCell(withIdentifier: "defCell", for: indexPath)
cell.textLabel?.text = "Unknown type of cell!"
return cell
}
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("Should return!")
return true
}
}
而对于一个小区:
class RTextCell: UITableViewCell, UITextFieldDelegate {
var textField = UITextField()
var data: Dictionary<String, Any>?
override func awakeFromNib() {
super.awakeFromNib()
textField.delegate = self
let padding = UIView(frame: CGRect(x:0, y:0, width: 15, height: self.frame.height))
textField = UITextField(frame: CGRect(x:0, y:0, width: self.frame.width, height: 40))
textField.placeholder = "Your text here"
textField.textColor = UIColor.white
textField.tintColor = UIColor.white
textField.backgroundColor = UIColor.clear
textField.leftView = padding
textField.leftViewMode = .always
self.addSubview(textField)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("Should return")
return true
}
func textFieldDidEndEditing(_ textField: UITextField) {
if data != nil {
data!["data"] = textField.text
print("DATA: \(data!)")
} else {
print("No data")
}
}
}
答
第一个问题 - 在您的单元类中,在awakeFromNib()
您有:
// CREATE a UITextField
var textField = UITextField()
var data: Dictionary<String, Any>?
override func awakeFromNib() {
super.awakeFromNib()
// assign self as the delegate of textField
textField.delegate = self
let padding = UIView(frame: CGRect(x:0, y:0, width: 15, height: self.frame.height))
// CREATE a NEW UITextField
textField = UITextField(frame: CGRect(x:0, y:0, width: self.frame.width, height: 40))
所以,当你创建新的文本框,它不再分配给它的委托。这就是为什么没有触发textFieldShouldReturn
或textFieldDidEndEditing
。
与更换UITextField(frame: ..)
行:
textField.frame = CGRect(x:0, y:0, width: self.frame.width, height: 40)
下,而不是在一个“数据对象”传递给然后尝试和操作,考虑使用回拨关闭。
你的类改成这样:
class RTextCell: UITableViewCell, UITextFieldDelegate {
var textField = UITextField()
// this will be our "call back" closure
var didEndEditAction : ((String)->())?
override func awakeFromNib() {
super.awakeFromNib()
textField.delegate = self
let padding = UIView(frame: CGRect(x:0, y:0, width: 15, height: self.frame.height))
// just set the frame, don't create a NEW textField
textField.frame = CGRect(x:0, y:0, width: self.frame.width, height: 40)
textField.placeholder = "Your text here"
textField.textColor = UIColor.white
textField.tintColor = UIColor.white
textField.backgroundColor = UIColor.clear
textField.leftView = padding
textField.leftViewMode = .always
self.addSubview(textField)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("Should return")
return true
}
func textFieldDidEndEditing(_ textField: UITextField) {
// call back using a closure
didEndEditAction?(textField.text ?? "")
}
}
,对其进行配置是这样的:
case "textbox":
let rTemplateTextBox = tableView.dequeueReusableCell(withIdentifier: "recapTextCell", for: indexPath) as! RTextCell
rTemplateTextBox.textField.text = cell["data"] as? String ?? "No text"
// setup the "call back" closure
rTemplateTextBox.didEndEditAction = {
(newText) in
let cell = self.myData[indexPath.row]
cell["data"] = newText
}
return rTemplateTextBox
+0
非常感谢! – Cheslav
答
你可以得到电池textField
数据的任何地方你tableView
声明只需要使用下面的代码
let indexPath = IndexPath(row: yourRow, section: yourSection)
let cell:InputDataCell = yourTable.cellForRow(at: indexPath) as! InputDataCell
if (cell.yourTextFieald.text?.characters.count)! {
print(cell.yourTextFieald.text!)
}
请为您的'UITableViewCell'子类,你的tableview控制器类都相关的代码。 –
@Cheslav我认为我的答案解决了您的问题 –
您正在RTextCell类中设置textfield.delegate。所以textFieldShouldReturn只能在该类中使用。你会在哪里使用textfield的数据。请解释一下? –